Sunan an-Nasa'i 4207

It was narrated that Kab bin Ujrah said:"The Messenger of Allah came out to us, and there were nine of us. He said; 'After me there will be rulers, whoever believes in their lies and helps them in their wrongdoing is not of me, and I am not of him, and he will not come to me at the Cistern. Whoever does not believe their lies and does not help them in their wrongdoing, he is of me, and I am of hi, and he will come to me at the Cistern