هُوَ الَّذي جَعَلَ الشَّمسَ ضِياءً وَالقَمَرَ نورًا وَقَدَّرَهُ مَنازِلَ لِتَعلَموا عَدَدَ السِّنينَ وَالحِسابَ ۚ ما خَلَقَ اللَّهُ ذٰلِكَ إِلّا بِالحَقِّ ۚ يُفَصِّلُ الآياتِ لِقَومٍ يَعلَمونَ

It is He who made the sun shining and the moon luminous, and determined its phases, so you may calculate the years and the passage of time. God didn’t create this except with truth. He explains the signs in detail for people who know.