Allah, the Exalted, said:
٢٤ - باب تغليظ عقوبة من أمر بمعروف أو نهى عن منكر وخالف قوله فعله
Allah, the Exalted, said:
Do you order righteousness of the people and forget1 yourselves while you recite the Scripture? Then will you not reason?
And He, the Exalted, said:
O you who have believed, why do you say what you do not do?
And He, the Exalted, said, reporting about Shuʿayb (peace and blessings be upon him):
He said, "O my people, have you considered: if I am upon clear evidence from my Lord and He has provided me with a good provision from Him...?1 And I do not intend to differ from you in that which I have forbidden you; I only intend reform as much as I am able. And my success is not but through Allāh. Upon Him I have relied, and to Him I return.2
And on the authority of Abū Zayd Usāmah ibn Ḥārithah (may Allah be pleased with them both), who said: I heard the Messenger of Allah (peace and blessings be upon him) say: "A man will be brought on the Day of Resurrection and cast into the Fire, and his intestines will spill out, and he will go round and round with them as a donkey goes round a millstone. The people of the Fire will gather around him and say: O so-and-so, what is the matter with you? Did you not enjoin what is right and forbid what is wrong? He will reply: Yes indeed, I used to enjoin what is right but not do it myself, and forbid what is wrong but do it myself." Agreed upon (al-Bukhārī and Muslim). [al-Nawawī said:] His words "tandaliqu" are with the undotted dāl, and its meaning is "to come out." And "al-aqtāb" are the intestines; its singular is "qitb."