Is it correct to differentiate between the impious (fasiq) and the disobedient (ʿāṣī) by saying that impiety (fisq) lies in rejecting a command, like the impiety of Iblis and the impiety of the opulent, and that disobedience (ʿiṣyān) lies in transgressing a prohibition, like the disobedience of Adam, and does this differentiation align with the creed of Ahlus-Sunnah?

The restriction of the description of wickedness (fisq) to the abandonment of obligations and the description of disobedience (isyan) to the commission of prohibitions is incorrect. Both terms have been used in the Quran to describe both matters (committing forbidden acts and neglecting obligations), such as describing Iblis and Pharaoh as disobedient, and describing those who transgressed on the Sabbath or falsely accused chaste women as wicked.

The correct understanding is that both terms encompass violating Allah's commands and prohibitions. The difference between them lies in rank and the gravity of the sin. Wickedness (fisq) is more severe than mere disobedience, and wickedness (fisq) is often applied to major sins, while disobedience (isyan) is applied to minor sins.