Ghafir (Arabic: غافر, ghāfir; meaning: "The All-Forgiving", referring to God), also known as Al-Muʼmin (Arabic: المؤمن, ’al-mu’min; meaning: The Believer), is the 40th chapter (sūrah) of the Qur'an, with 85 verses (āyāt). It takes its name from verse 28, which mentions a distinguished believer from among the clan of the Pharaoh who supported Moses, referring to him as a "believing man," hence al-Mu'min; The Believer. However, this surah is most often called al-Ghafir (the All-Forgiving) because of the Divine Name mentioned in verse 3.

Regarding the timing and contextual background of the believed revelation (asbāb al-nuzūl), it is a "Meccan surah", which means it is believed to have been revealed in Mecca, rather than later in Medina.