Al-Qamar closes with a compact statement later Islamic creed treats as a foundational proof text for the doctrine of qadar, divine decree: 'indeed, all things We created with predestination' (54:49). Classical theology developed belief in qadar into one of the standard articles of faith alongside belief in God, angels, revealed books, messengers and the Last Day, understanding the verse as affirming that every event unfolds according to God's prior knowledge and decree without thereby, in the mainstream theological position, eliminating meaningful human choice and responsibility, a balance different schools of Islamic theology struck in somewhat different ways across the classical period.
Commentators read the verse's placement at the close of a surah otherwise devoted to signs, destroyed nations and the approaching Hour as tying the specific fates it has just described, the drowned people of Noah, the annihilated Ad and Thamud, Pharaoh's host, back to a single governing principle: nothing described across the surah's catalogue of judgement occurred outside a measure already established, an idea some later theological schools debated at length regarding its implications for human freedom and moral responsibility.