Sayyiduna Ka'b bin Ujrah (may Allah be pleased with him) said: The Messenger of Allah (peace and blessings be upon him) said: "May Allah protect you from rulers who will come after me." I said: "What is that?" He (peace and blessings be upon him) said: "Whoever goes in to them, affirms their lies and helps them in their injustice is not from me and I am not from him, and he will never come to the Pond. And whoever does not go in to them, does not affirm their lies and does not help them in their injustice is from me and I am from him, and he will come to my Pond."
"Flesh nourished on unlawful earnings will not enter Paradise, and for any flesh nourished on unlawful earnings the Fire is more fitting. People go out in the morning in two ways: one who squanders himself and so destroys himself, and one who ransoms himself (from sins) and so frees himself. Prayer is a proof, fasting is a shield, and charity extinguishes sin just as water extinguishes fire."
Hadith Referenceالمعجم الكبير للطبراني / باب الكاف / 16348