Jabir bin Abdullah reported,

The Prophet ﷺ said to Kaab bin Ujra, "May Allah protect you from the rule of the foolish."Kaab asked, "What is the rule of the foolish?"He replied, "Rulers who will come after me who do not follow my guidance and do not adhere to my way. Whoever affirms their lies and supports them in their oppression, such people are not from me, nor am I from them, and they will not come to me at my Pool. But whoever does not affirm their lies and does not support them in their oppression, such people are from me, and I am from them, and they will come to me at my Pool.Kaab bin Ujra, fasting is a shield, charity extinguishes sin, and prayer is an offering," or he said, "a proof.Kaab bin Ujra, no flesh that has grown from unlawful earnings will enter Paradise. The Fire has more right to it.Kaab bin Ujra, people set out in two ways. One sells himself and ransoms his soul, while the other sells himself and destroys it."

عن جابر بن عبد الله

أن النبي ﷺ قال لكعب بن عجرة: أعاذ الله من إمارة السفهاء. قال: وما إمارة السفهاء؟ قال: أمراء يكونون بعدي لا يقتدون بهديي، ولا يستنون بسنتي، فمن صدقهم بكذبهم، وأعانهم على ظلمهم، فأولئك ليسوا مني، ولست منهم، ولا يردوا علي حوضي، ومن لم يصدقهم بكذبهم، ولم يعنهم على ظلمهم، فأولئك مني وأنا منهم، وسيردوا علي حوضي. يا كعب بن عجرة: الصوم جنة، والصدقة تطفئ الخطيئة، والصلاة قربان- أو قال: برهان-. يا كعب بن عجرة، إنه لا يدخل الجنة لحم نبت من سحت النار أولى به يا كعب بن عجرة، الناس غاديان: فمبتاع نفسه فمعتقها، وبائع نفسه فموبقها.