Sayyiduna Ka'b bin Ujrah (may Allah be pleased with him) said: The Messenger of Allah (peace and blessings be upon him) came out to us while we were nine men, five Arabs and four non-Arabs, and he (peace and blessings be upon him) said: "Listen! Have you not heard that after me there will be rulers? 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 not be one to come to the Pond. And whoever does not go in to them and does not help them in their injustice is from me and I am from him, and he will come to the Pond."
Hadith Referenceالمعجم الكبير للطبراني / باب الكاف / 16346