Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
quran:91:2

And ˹by˺ the moon when it follows it  

and ˹by˺ the moon when it follows her, rising after she has set,
القرآن:٩١:٢

وَالْقَمَرِ إِذَا تَلَاهَا  

{والقمر إذا تلاها} تبعها طالعا عند غروبها.

See similar narrations below:

Collected by Qurʾān
quran:84:18

And ˹by˺ the moon when it becomes full  

and ˹by˺ the moon when it is at the full, and its light is complete, and this happens during the nights of the full moon:
القرآن:٨٤:١٨

وَالْقَمَرِ إِذَا اتَّسَقَ  

{والقمر إذا اتسق} اجتمع وتم نوره وذلك في الليالي البيض.