Abdur Rahman bin Mahdi عبد الرحمن بن مهدي · The Book of al-Bay'ah

"While there was a group of his companions around him, the Messenger of Allah said: 'Pledge to me, that you will not associate anything with Allah, nor steal, nor commit unlawful sexual relations, nor kill your children; you will not utter slander, fabricating from between your hands and feet, and you will not disobey me in goodness (Ma'ruf). Whoever fulfills (this pledge), his reward will be with Allah, and whoever commits any of these actions and is punished for it,…

"I heard 'Umar bin Al-Khattab say: 'There is no more emigration (Hijrah) after the death of the Messenger of Allah."'

"When we gave our pledge to the Messenger of Allah to hear and obey, he would say to us: 'In as much as you can".

"Religion is sincerity, religion is sincerity (Al-Nasihah), religion is sincerity." They said; "To whom, O Messenger of Allah?" He said: "To Allah, to His Book, to His Messenger, to the imams of the Muslims and to their common folk."