Is it obligatory to advise someone who is highly likely to fall into a common error that violates Islamic law, and does this apply to all people and necessitate initiating the advice? What are the regulations for advice and its ruling on immediacy? What is the ruling on advising a newly committed individual who might be bothered by advice, and is advice obligatory in everything?

The questioner is thanked for his eagerness to guide others. A Muslim strives, to the best of his ability, to advise people, teach the ignorant among them, and warn them against evil and common mistakes by clarifying their rulings. Advice is obligatory upon a Muslim towards his Muslim brother whenever he is able to give it. It is stated in Al-Nawawi's commentary on Muslim that advising Muslims means guiding them to what benefits them in their afterlife and worldly life, warding off harm from them, and teaching them what they are ignorant of regarding their religion. Advice is binding according to one's capacity if the advisor knows that his advice will be accepted. It is not permissible to accuse someone of committing mistakes merely because they are widespread, for the default state of Muslims is safety from indecencies. Allah has forbidden ill-suspicion, spying, and seeking out faults. Furthermore, promptly offering advice is obligatory when there is a shortcoming in a duty that is feared to be missed. If a Muslim sees a reprehensible act, he must denounce it according to his capacity, for the Prophet, peace and blessings be upon him, said: "Whoever among you sees an evil, let him change it with his hand; if he cannot, then with his tongue; if he cannot, then with his heart—and that is the weakest of faith."