Islam began as something strange and will return to being strange

Sayyiduna Sa'd bin Abi Waqqas (may Allah be pleased with him) narrates: I heard the Prophet (peace and blessings be upon him) say: "Indeed Islam began as a stranger, and soon it will again become a stranger as it began. So glad tidings at that time to the strangers, when (other) people have become corrupt. By the One in whose hand is the soul of Abu al-Qasim, faith will retreat to the area between these two mosques just as a snake retreats to its hole."
Ahmad, al-Bazzar and Abu Ya'la recorded it, and the narrators of Ahmad and Abu Ya'la are the narrators of the Sahih.

Sayyiduna Abd al-Rahman bin Sannah (may Allah be pleased with him) narrates that he heard the Prophet (peace and blessings be upon him) say: "Islam began as a stranger, then it will again become a stranger as it was at first; so glad tidings to the strangers." It was asked: "O Messenger of Allah! Who are the strangers?" The Prophet (peace and blessings be upon him) said: "Those who remain upright when people become corrupt. By the One in whose hand is my soul, faith will rush towards Madinah just as floodwater rushes; by the One in whose hand is my soul, Islam will retreat to the area between these two mosques just as a snake retreats to its hole."
Abdullah and al-Tabarani recorded it; its chain contains Ishaq bin Abdullah bin Abi Farwah, who is matruk (abandoned).

Sayyiduna Abdullah bin Amr (may Allah be pleased with him) narrates: One day, while we were with him, the Prophet (peace and blessings be upon him) said: "Glad tidings to the strangers." It was asked: "O Messenger of Allah! Who will the strangers be?" The Prophet (peace and blessings be upon him) said: "Righteous people who will be among many evil people, and those who disobey them will be more than those who obey them."
Ahmad recorded it, and al-Tabarani recorded it in al-Mu'jam al-Awsat with the words: "People who are righteous and few." Its chain contains Ibn Lahi'ah, and there is weakness in him.

Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) reports that the Prophet (peace and blessings be upon him) said: "Islam began as a stranger, and soon it will again become a stranger as it was at the beginning; so glad tidings to the strangers." (Al-Haythami says:) I say:
This narration is mentioned in the Sahih, but without the words: "so glad tidings to the strangers." Al-Bazzar recorded it; its chain contains Layth bin Abi Sulaym, who is a mudallis. (Al-Haythami says:) I say: Before this, the hadith of four Companions narrated with a single chain has already passed, within another hadith, in the chapter on the division of the Ummah, a little earlier.

Sayyiduna Sahl bin Sa'd al-Sa'idi (may Allah be pleased with him) narrates that the Prophet (peace and blessings be upon him) said: "Indeed Islam began as a stranger, and soon it will again become a stranger as it began; so glad tidings to the strangers." The people asked: "O Messenger of Allah! Who are the strangers?" The Prophet (peace and blessings be upon him) said: "Those who remain upright when (other) people become corrupt."
Al-Tabarani recorded it in all three of his books, and its narrators are the narrators of the Sahih, except Bakr bin Sulaym, and he is thiqah (trustworthy).

Sayyiduna Jabir bin Abdullah (may Allah be pleased with him) narrates that the Prophet (peace and blessings be upon him) said: "Indeed Islam began as a stranger, and soon it will again become a stranger; so glad tidings to the strangers." The narrator asked: "O Messenger of Allah! Who is meant by the strangers?" The Prophet (peace and blessings be upon him) said: "Those who remain upright when (other) people become corrupt."
Al-Tabarani recorded it in al-Mu'jam al-Awsat; its chain contains Abdullah bin Salih, the scribe of al-Layth, who is da'if (weak), though he has been declared trustworthy.

Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) narrates that the Prophet (peace and blessings be upon him) said: "Indeed Islam began as a stranger, and soon it will again become a stranger; so glad tidings to the strangers." After this the narrator mentioned the full hadith, which will also come later.
Al-Tabarani recorded it in al-Mu'jam al-Awsat and al-Mu'jam al-Kabir; its chain contains Layth bin Abi Sulaym, who is a mudallis.

Sayyiduna Abu Sa'id al-Khudri (may Allah be pleased with him) narrates that the Prophet (peace and blessings be upon him) said: "Islam began as a stranger, and soon it will again become a stranger as it began; so glad tidings to the strangers."
Al-Tabarani recorded it in al-Mu'jam al-Awsat; its chain contains Atiyyah, who is da'if (weak).

Sayyiduna Salman al-Farisi (may Allah be pleased with him) narrates that the Prophet (peace and blessings be upon him) said: "Indeed Islam began as a stranger, and soon it will again become a stranger."
Al-Tabarani recorded it; its chain contains Ubays bin Maymun, who is matruk (abandoned).

Sayyiduna Abu Musa al-Ash'ari (may Allah be pleased with him) narrates that the Prophet (peace and blessings be upon him) said: "The Hour will not be established until the earth is drenched with blood and Islam becomes a stranger." After this the narrator mentioned the full hadith. Its chain contains Sulayman bin Ahmad al-Wasiti, who is da'if (weak).