Is disapproval to be with the heart or with the tongue, given the Hadith: "Indeed, there will be rulers over you, and you will recognize some of their deeds and disapprove of others. So, whoever detests it is absolved, and whoever disapproves is safe, but whoever is pleased and follows them [is not]." They said: "O Messenger of Allah, should we not fight them?" He said: "No, as long as they pray," and Imam Muslim's explanation: "Meaning: whoever detests with his heart, and disapproves with his heart"?

Qatadah's interpretation of the hadith (definition): "Whoever dislikes it has been absolved, and whoever denounces it has been saved," as referring to disliking and denouncing with the heart, is a point of contention among scholars. Some believe that denunciation is with the tongue and disliking is with the heart, and that Qatadah's interpretation is unsound because it equates the two meanings. They supported their view with other narrations that differentiate between them. Others, however, maintained that Qatadah's interpretation is correct, arguing that the denunciation mentioned in the hadith stems from the heart's denunciation, or that denunciation here includes what begins in the heart. The summary is that disliking evil with the heart is required in all circumstances, and denunciation with the tongue is also required, provided no discord is feared.