Is a Muslim who commits adultery considered an unbeliever?

Adultery is a major sin (kabeerah) that warrants a prescribed punishment (hadd) in this world and torment in the

Hereafter for whoever does not repent from it. However, it is not an act of disbelief that expels one from the

faith, unless the adulterer deems it permissible. For, according to the

Ahlus-Sunnah (definition) wal-Jama‘ah (mainstream Sunnis), sins do not render their perpetrator a disbeliever.