Game na la'anar wani takamaiman mutum saboda aikata wani abin sabo, kamar azzalumi, mazinaci, mai zana hotuna, barawo, ko mai cin riba: nassosin hadisi suna nuna cewa hakan ba haramun ba ne, sai dai Ghazali ya nuna (kuma shi ne ra'ayi mafi inganci) cewa haramun ne, sai dai idan mutumin da ake la'ana mun san cewa ya mutu a kan kafirci, kamar Abu Lahab, Abu Jahl, Fir'auna, Haman, da waɗanda suke kamar su. Ghazali ya ce dalilin haka shi ne: "la'ana tana nufin nisantar wani daga rahamar Allah Maɗaukakin Sarki, alhali kuma ba mu san yadda takamaiman mai aikin sabo ko kafiri zai ƙare rayuwarsa ba." Game da waɗanda Annabi (ﷺ) ya la'ance su da kansa, kamar kabilun Ri'la, Zakwan da 'Usiah, watakila hakan ya kasance ne saboda ya san cewa za su mutu a kan kafirci.
Addu'ar sharri ga wani mutum kamar la'ana take, koda kuwa a kan azzalumi ne, kamar a ce "Allah kada ya warkar da shi," "Allah kada ya kiyaye shi," da makamantan waɗannan maganganu, dukkansu abin zargi ne (haramun ne idan ga Musulmi). Haka kuma la'antar kowane dabba ko abu marar rai, duk wannan abin ƙi ne.
Saboda haka malamai suna cewa: "Duk wanda ya la'anci wanda bai cancanci haka ba, to ya gyara maganarsa da cewa, idan ya cancanci la'ana." Ya halatta ga wanda yake kira zuwa ga alheri kuma yana hana sabo ya ce wa wani: "Kaitonka", "Ya kai wanda ya zalunci kansa", da makamantan haka. Amma dole ne ya guji ƙarya, zargi na ƙarya, da ɓatanci. Baya ga haka, manufarsa ta zama gargaɗi, ba zagin mutane ba.
As for cursing a particular person who commits some act of disobedience, such as an oppressor, adulterer, maker of pictures, the thief, or the one who consumes usurious gain; the hadith evidence seems to suggest that it is not unlawful, though Ghazali indicates (and it is the most reliable opinion) that is unlawful unless the person cursed is someone we know has died in a state of unbelief, such as Abu Lahab, Abu Jahl, Pharaoh, Haman, and others like them. This, Ghazali notes, is because "to curse means to distance another from the mercy of Allah Most High, while we do not know how the particular corrupt person or non-Muslim will end his life." As for those the Prophet (pbuh) personally cursed such as the tribes of Ri'la, Zakwan and 'Usiah, perhaps it was because he knew they would die in unbelief. Praying that evil befalls a person is similar to cursing, even when against a tyrant, such as saying, 'May Allah not heal him,' 'May Allah not keep him safe,' and similar remarks, all of which are blameworthy (being unlawful, if of a Muslim). And likewise for cursing any animals or inanimate objects whatever, all this is objectionable." The scholars therefore say, "Whoever curses someone who does not deserve so, let the former modify it by saying, if he deserves to be cursed.'" It is permissible for one who invites to good and forbids evil to address someone saying, "woe to you', "O you who have wronged his own self" and the like. Provided that he should avoid lying defamation, slander. Besides this, his objective should be admonishing and not insulting people.