What are the sayings of scholars regarding the harm considered (sufficient) for abandoning the denunciation of evil (munkar), and are cursing or reviling considered part of this harm, and is it a condition that the occurrence of harm be highly probable?

The obligation to enjoin good and forbid evil is waived when there is an expectation of significant harm to oneself, one's body, one's property, or one's honor. The harm considered is that which outweighs the harm expected from enjoining good in religious matters. As for minor harm, such as insults, backbiting, or criticism, it does not waive the obligation. It is stipulated that the expectation of harm must be based on strong presumption (al-ẓann al-ghālib) or certain knowledge (al-ʿilm al-yaqīnī), and mere doubt or possibility is not sufficient.