He prayed with the Messenger of Allah (ﷺ) one night and he heard him say when he said the takbir: "Allahu Akbara dhal-jabaruti wal-malakuti wal-kibriya'i wal-'azamah (Allah is Most Great, the One Who has all power, sovereignty, magnificence and might.)" When bowing he would say: "Subhana Rabbial-'Azim (Glory be to my Lord Almighty)." When he raised his head from bowing he would say: "Lirabbil-hamd, Lirabbil-hamd (To my Lord be praise, to my Lord be praise)." And when he prostrated (he said): "Subhana Rabbial-A'la (Glory be to my Lord Most High)." And between the two prostrations (he said): "Rabbighfirli, Rabbighfirli (Lord forgive me, Lord forgive me)." His standing, his bowing, when he raised his head from bowing, his prostration and the time between the two prostrations, were almost the same.
Sunan an-Nasa'i Book 12, Hadith 41
:
“When the Messenger of Allah died and Abu Bakr was appointed as Khalifah, and some of the Arab’s disbelieved, Umar said: ‘O Abu Bakr! How can you fight the people when the Messenger of Allah said: I have been commanded to fight the people until they say La ilaha illallah (there is none worthy of worship except Allah). Whoever says La ilaha illallah, his life and his property are safe from me, except for its right, and his reckoning will be with Allah?’ Abu Bakr, may Allah be pleased with him, said: ‘By Allah, I will surely fight those who separate prayer and Zakah, for Zakah is what is due on wealth. By Allah, if they withhold from me a small she-goat that they used to give to the Messenger of Allah I will fight them for withholding it.’ (Umar said) ‘By Allah, when I realized that Allah, the Mighty and Sublime, had opened the chest of Abu Bakr to fighting, then I knew that it was the truth.’”
Sunan an-Nasa'i Book 25, Hadith 7
Malik related to me from Safwan ibn Sulaym from Ata ibn Yasar
that the Messenger of Allah, may Allah bless him and grant him peace,
was questioned by a man who said, "Messenger of Allah, shall I ask
permission of my mother to enter?" He said, "Yes " The man said, "I
live with her in the house". The Messenger of Allah, may Allah bless
him and grant him peace, said "Ask her permission." The man said, "I
am her servant." The Messenger of Allah. may Allah bless him and grant
him peace, said, "Ask her permission. Do you want to see her naked?"
He said, "No." He said, "Then ask her permission."
Muwatta Malik Book 54, Hadith 1