Shu'bah bin al-Hajjaj شعبة بن الحجاج · The Book of al-Bay'ah

"You have to obey when you feel energetic and when you feel tired, during your ease and your hardship, and when others are preferred over you."

"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,…

"A man said: 'O Messenger of Allah! Which emigration (Hijrah) is best?' He said: 'To leave what your Lord, the Mighty and Sublime, dislikes.' He said: 'There are two kinds of emigration, the emigration of the town dweller and the emigration of the Bedouin. As for the Bedouin, when he is called (to fight in Jihad) he must respond, and he must obey when he is commanded, and as for the town dweller, he is the one who is more…

"Among the delegation of Thaqif there was a man who suffered from leprosy. The Prophet sent word to him saying: 'Go back, for I have accepted your pledge."'

"Military campaigns are of two types: as for the one who seeks the Face of Allah, obeys the imam, spends what is precious and avoids mischief, whether he is asleep or awake, he is earning reward. But as for the one who fights in order to show off and gain a reputation, and disobeys the imam and spreads mischief in the land, he comes back empty-handed." (Da 'if)