What is the method of advising a tyrannical ruler?

Question:
What do you say about taking action against a ruler for his tyranny, or because of the tyranny of his subordinate?

Answer:
This is not a good statement at all. However, regarding advising: if there is tyranny or negligence on the part of the ruler, he should be advised. It is not permissible to rebel against him. The people must obey and be loyal to him in what is right, and they must not rebel against him because of his tyranny or disobedience. This is not permissible. However, advising and directing him to good is required, because rebellion leads to great evil. This is the religion of the Khawarij: rebelling against the sultans, which is the religion of the Khawarij and the Mu'tazilah.
As for the people of the Sunnah and the community, they hold that obedience and loyalty are due to them—the rulers—even if they disobey, and even if they commit sin, obedience and loyalty are obligatory toward them, as long as you do not see clear disbelief from them, with proof from Allah, and with the ability to act on it. The author's statement on this matter contains deficiency and weakness, may Allah have mercy on him.