Surah Taa-Haa (20) — Ayah 115

15. 1. Forgetfulness (nisyan) is inherent in the nature of every human being, and weakness of will, that is, lack of determination, is also generally found in human character. These two weaknesses are what cause one to fall into the whispers of Satan. If these weaknesses do not include the spirit of rebellion and defiance against Allah’s command, and a firm intention to disobey Allah, then a mistake made out of forgetfulness and weakness of will is not contrary to the infallibility and perfection of prophethood, because after such a mistake, a person immediately becomes remorseful, humbles himself before Allah, and engages in repentance and seeking forgiveness. (As Prophet Adam ؑ did.) Allah had instructed Prophet Adam ؑ that Satan is your enemy and the enemy of your wife; he will cause you to be expelled from Paradise. This is the matter that is referred to here as the covenant. Adam ؑ forgot this covenant, and Allah had forbidden Prophet Adam ؑ from going near a certain tree, that is, from eating anything from it. Prophet Adam ؑ had it in his heart that he would not go near that tree. But when Satan swore by Allah and convinced them that its fruit has such an effect that whoever eats it attains eternal life and everlasting kingdom, he could not remain firm in his resolve, and due to this lack of determination, he fell prey to Satanic whispers.