وَٱلۡقَمَرَ قَدَّرۡنَٰهُ مَنَازِلَ حَتَّىٰ عَادَ كَٱلۡعُرۡجُونِ ٱلۡقَدِيمِ
As for the moon, We have ordained its phases, until it becomes like an old palm leaf.
Agha Ali Puya Commentary
Commentary on Quran 36:39
[Pooya/Ali Commentary 36:39] The lunar stages are the 28 divisions of the Zodiac. Urjun refers to the sickle-like appearance of the new moon at the end of the lunar month after passing through the 28 divisions, one every night.