Allāhumma fa-ayyumā muʾminin Dua: Protection from Grieving a Believer

The Prophet (peace and blessings be upon him) prayed: "O Allah! Whichever believer I have spoken to with a word that grieved him, on the Day of Resurrection make that word a means of nearness to You for him" (Sahih al-Bukhari, Daawat 34).

This dua shows how sensitive a heart the Prophet (peace and blessings be upon him) had. He never wished to hurt any believer; he repented even for words he might have said without being aware of it, and he asked Allah to turn the consequence of such a word to that believer's benefit.

If the Prophet (peace and blessings be upon him), although he was sinless — that is, protected from committing sin — prayed with such sensitivity, then we, as people who do commit sins, must be far more careful, and we must recite this dua for the believers whom we have hurt without being aware of it.

This dua should be recited whenever we may have hurt others without being aware of it, whenever we may have violated the rights owed to another person, and generally in order to be careful in our dealings with people.