Surah Ash-Shuraa 42:12

لَهُۥ مَقَالِيدُ ٱلسَّمَـٰوَٰتِ وَٱلْأَرْضِ ۖ يَبْسُطُ ٱلرِّزْقَ لِمَن يَشَآءُ وَيَقْدِرُ ۚ إِنَّهُۥ بِكُلِّ شَىْءٍ عَلِيمٌ

To Him belong the keys of the heavens and the earth. He extends provision for whom He wills and restricts [it]. Indeed He is, of all things, Knowing.

Translation: Saheeh International

Tafsir

To Him belong the keys of the heavens and the earth the keys to their storehouses of rain and vegetation and other things. He extends provision He makes it abundant for whomever He will as a test of their gratitude and He restricts it He straitens it for whomever He will as a trial. …

Excerpt from Tafsir al-Jalalayn, commentary on 42:12, via Quran.com. The reader has the full commentary and 9 more tafsirs.