Surah Al-Muzzammil 73:9

رَّبُّ ٱلْمَشْرِقِ وَٱلْمَغْرِبِ لَآ إِلَـٰهَ إِلَّا هُوَ فَٱتَّخِذْهُ وَكِيلًا

[He is] the Lord of the East and the West; there is no deity except Him, so take Him as Disposer of [your] affairs.

Translation: Saheeh International

Tafsir

He is Lord of the east and the west; there is no god except Him so take Him for a Guardian entrusting your affairs to Him

Excerpt from Tafsir al-Jalalayn, commentary on 73:9, via Quran.com. The reader has the full commentary and 9 more tafsirs.