The adhan while travelling

Sayyiduna Jubayr bin Mut'im (may Allah be pleased with him) states: During journeys, the Prophet (peace and blessings be upon him) did not have the adhan given when performing prayer; he only had the iqamah said. The morning prayer, however, was different, for which he would have both the adhan and the iqamah given.
Imam al-Tabarani recorded this narration in al-Mu'jam al-Kabir. Its chain contains a narrator, Dirar bin Surad, who is da'if (weak).

Sayyiduna Abdullah bin Adi (may Allah be pleased with him) states: During journeys the Prophet (peace and blessings be upon him) did not have the adhan given, except in the morning prayer, when he had the adhan given; he would have the iqamah said.
Imam al-Tabarani recorded this narration in al-Mu'jam al-Kabir. Its chain contains a narrator, Ya'qub bin Humayd, whom Yahya bin Ma'in and others declared da'if (weak). Imam Bukhari (may Allah have mercy on him) says: We know nothing but good about him. Ibn Hibban mentioned him in his book al-Thiqat and stated: He makes mistakes.

Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) states: Once during a journey we were with the Prophet (peace and blessings be upon him). He heard a mu'adhdhin giving the adhan. When he said "Allahu akbar, Allahu akbar (Allah is the Greatest, Allah is the Greatest)," the Prophet (peace and blessings be upon him) said, "He is upon the fitrah (natural disposition)." When he said "Ashhadu an la ilaha illallah (I bear witness that there is no god but Allah)," the Prophet (peace and blessings be upon him) said, "He has come out of Hell." We hurried towards that man, and he turned out to be a man among his livestock; the time of prayer had come, so he had given the adhan for it.
Imam Ahmad, Imam Abu Ya'la and Imam al-Tabarani in al-Mu'jam al-Kabir recorded this narration. The narrators of Imam Ahmad are the narrators of the Sahih.

Sayyiduna Mu'adh bin Jabal (may Allah be pleased with him) states: During a journey the Prophet (peace and blessings be upon him) heard a mu'adhdhin saying "Allahu akbar, Allahu akbar (Allah is the Greatest, Allah is the Greatest)," and he said, "He is upon the fitrah (natural disposition)." When he recited "Ashhadu an la ilaha illallah (I bear witness that there is no god but Allah)," the Prophet (peace and blessings be upon him) said, "He has borne witness to the truth." When he recited "Ashhadu anna Muhammadan rasulullah (I bear witness that Muhammad is the Messenger of Allah)," the Prophet (peace and blessings be upon him) said, "He has come out of Hell. Look for him; you will find that he is either a shepherd who is far from his family or someone who hunts with dogs." When the people looked for him, they found that he was a shepherd for whom the time of prayer had come, so he had given the adhan for the prayer.
Imam Ahmad and Imam al-Tabarani in al-Mu'jam al-Saghir recorded this narration. Its chain contains a narrator, al-Hakam bin Abd al-Malik al-Qurashi, who is da'if (weak).

Sayyiduna Abdullah bin Rabi'ah al-Sulami (may Allah be pleased with him) states: The Prophet (peace and blessings be upon him) was on a journey, and he heard a mu'adhdhin saying "Ashhadu an la ilaha illallah (I bear witness that there is no god but Allah)." The Prophet (peace and blessings be upon him) said, "I too bear witness that there is no god besides Allah Almighty." The mu'adhdhin said "Ashhadu anna Muhammadan rasulullah (I bear witness that Muhammad is the Messenger of Allah)." The Prophet (peace and blessings be upon him) said, "I bear witness that Sayyiduna Muhammad (peace and blessings be upon him) is the Messenger of Allah." Then the Prophet (peace and blessings be upon him) said, "You will find him to be a shepherd of goats or a man away from his family."
Imam Ahmad and Imam al-Tabarani in al-Mu'jam al-Kabir recorded this narration, and he added these words: When they came down into the valley, there was a dead goat there. He said, "Do you think that it is worthless to its owner?" The people said, "Yes." The Prophet (peace and blessings be upon him) said, "This world is more worthless in the sight of Allah Almighty than this (dead goat) is to its owners." The narrators of this narration are the narrators of the Sahih.

Sayyiduna Abu Juhayfah (may Allah be pleased with him) states: The Prophet (peace and blessings be upon him) was travelling, and he heard a mu'adhdhin saying "Ashhadu an la ilaha illallah (I bear witness that there is no god but Allah)." The Prophet (peace and blessings be upon him) said, "He has disowned the rivals (set up with Allah)." He said "Ashhadu anna Muhammadan rasulullah (I bear witness that Muhammad is the Messenger of Allah)," and the Prophet (peace and blessings be upon him) said, "He has come out of Hell." Then the Prophet (peace and blessings be upon him) said, "You will find him to be an owner of goats who is apart from his family, or a man with dogs."
Imam al-Bazzar recorded this narration, and its narrators are thiqat (trustworthy).

Sayyiduna Abu Juhayfah (may Allah be pleased with him) states: The Prophet (peace and blessings be upon him) was travelling, and he heard someone saying "Allahu akbar, Allahu akbar (Allah is the Greatest, Allah is the Greatest)" (that is, he heard him giving the adhan). The Prophet (peace and blessings be upon him) said, "This is the call of truth." He said "Ashhadu an la ilaha illallah (I bear witness that there is no god but Allah)," and the Prophet (peace and blessings be upon him) said, "This is the word of sincerity (ikhlas)." He recited "Ashhadu anna Muhammadan rasulullah (I bear witness that Muhammad is the Messenger of Allah)," and the Prophet (peace and blessings be upon him) said, "The one who says this has come out of Hell." Then the Prophet (peace and blessings be upon him) said, "You will find this man to be an owner of goats, or a man with dogs who is out hunting."
Imam al-Tabarani recorded this narration in al-Mu'jam al-Kabir. Its chain contains a narrator, Musa bin Muhammad bin Hibban, whom Imam Abu Zur'ah declared da'if (weak). Ibn Hibban mentioned him in his book al-Thiqat and stated that he sometimes narrates contrary to others. The remaining narrators of this narration are thiqat (trustworthy).

Sayyiduna Abu Sa'id al-Khudri (may Allah be pleased with him) states: We were with the Prophet (peace and blessings be upon him) on a journey, and we heard a man saying "Allahu akbar, Allahu akbar, ashhadu an la ilaha illallah, ashhadu anna Muhammadan rasulullah (Allah is the Greatest, Allah is the Greatest, I bear witness that there is no god but Allah, I bear witness that Muhammad is the Messenger of Allah)" (that is, we heard him giving the adhan). He said, "He has come out of polytheism (shirk)."
Imam al-Bazzar recorded this narration, and its narrators are thiqat (trustworthy).

Sayyiduna Abu Umamah (may Allah be pleased with him) states: One day the Prophet (peace and blessings be upon him) went out, and with him were Sayyiduna Abu Bakr, Sayyiduna Umar, Sayyiduna Zayd bin Thabit, Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him), Sayyiduna Ubayy bin Ka'b and Sayyiduna Abdullah bin Abbas (may Allah be pleased with them). The Prophet (peace and blessings be upon him) was riding his she-camel al-Jad'a'. When he came out beyond the settlement, he heard a man saying "Allahu akbar, Allahu akbar (Allah is the Greatest, Allah is the Greatest)." The Prophet (peace and blessings be upon him) stopped and listened attentively. When he said "Allahu akbar, Allahu akbar," the Prophet (peace and blessings be upon him) said, "By the One in whose hand is my soul, he has borne the testimony of truth." When he recited "Ashhadu an la ilaha illallah (I bear witness that there is no god but Allah)," the Prophet (peace and blessings be upon him) said, "Regarding this man, I consider, by the One in whose hand is my soul, that he has come out of Hell." He said this three times. Then he (peace and blessings be upon him) said, "This will be a man with dogs (who has gone out to hunt)." Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) and Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) went and found the man just so.
Imam al-Tabarani recorded this narration in al-Mu'jam al-Kabir. Its chain contains a narrator, Ali bin Yazid al-Alhani, who is da'if (weak).

Sayyiduna Safwan bin Assal (may Allah be pleased with him) states: Once we were with the Prophet (peace and blessings be upon him) when he heard a man giving the adhan. The Prophet (peace and blessings be upon him) said, "He is upon the fitrah (natural disposition)." He said "Ashhadu an la ilaha illallah (I bear witness that there is no god but Allah)," and the Prophet (peace and blessings be upon him) said, "He has borne true witness." He recited "Ashhadu anna Muhammadan rasulullah (I bear witness that Muhammad is the Messenger of Allah)," and the Prophet (peace and blessings be upon him) said, "He has come out of Hell."
Imam al-Tabarani recorded this narration in al-Mu'jam al-Kabir. Its chain contains a narrator, Ata' bin Ajlan, who has been accused of lying, and he is matruk al-hadith (abandoned in hadith).