It is narrated from Sayyiduna Bilal (may Allah be pleased with him) that in the Fajr adhan he used to say: "Hayya 'ala khayr al-'amal (Come to the best of deeds)." So the Messenger of Allah (peace and blessings be upon him) ordered that in its place should be said: "As-salatu khayrun min an-nawm (Prayer is better than sleep)," and saying "Hayya 'ala khayr al-'amal" was left off.
Hadith Referenceالمعجم الكبير للطبراني / باب الباء / 1067
Through the same chain, it is narrated from Sayyiduna Bilal (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "When you give the adhan, put your fingers in your ears, for it makes your voice louder."
Hadith Referenceالمعجم الكبير للطبراني / باب الباء / 1068
It is narrated from Sayyiduna Bilal (may Allah be pleased with him) that he used to give the adhan for the Prophet (peace and blessings be upon him), and he would give the adhan like this: "Allah is the Greatest, Allah is the Greatest. I bear witness that there is no true deity except Allah, I bear witness that there is no true deity except Allah." Then he would turn towards the right of the qiblah and say: "I bear witness that Muhammad (peace and blessings be upon him) is the Messenger of Allah, I bear witness that Muhammad (peace and blessings be upon him) is the Messenger of Allah." Then he would turn and face the side behind the qiblah and say: "Come to prayer, come to prayer." Then he would turn to his left and say: "Come to success, come to success." Then he would face the qiblah and say: "Allah is the Greatest, Allah is the Greatest, there is no true deity except Allah." He also used to give the iqamah for the Prophet (peace and blessings be upon him), and he would say the words of the iqamah once each: "Allah is the Greatest, Allah is the Greatest. I bear witness that there is no true deity except Allah, and I bear witness that Muhammad (peace and blessings be upon him) is the Messenger of Allah. Come to prayer, come to success. The prayer has begun. Allah is the Greatest, Allah is the Greatest, there is no true deity except Allah."
Hadith Referenceالمعجم الكبير للطبراني / باب الباء / 1069
Suwayd bin Ghafalah said: The last adhan of Bilal (may Allah be pleased with him) was: "There is no true deity except Allah, and Allah is the Greatest."
Hadith Referenceالمعجم الكبير للطبراني / باب الباء / 1070
It is narrated from Sayyiduna Bilal (may Allah be pleased with him) that on Friday he used to give the adhan for the Messenger of Allah (peace and blessings be upon him) when the shadow had become the length of a sandal strap, when the Prophet (peace and blessings be upon him) sat on the pulpit.
Hadith Referenceالمعجم الكبير للطبراني / باب الباء / 1071
Sayyiduna Bilal (may Allah be pleased with him) said: I heard the Messenger of Allah (peace and blessings be upon him) saying: "The most excellent deed of the believer is jihad in the path of Allah."
Hadith Referenceالمعجم الكبير للطبراني / باب الباء / 1072