Ash-Shuraa 42:10

Wama ikhtalaftum feehi min shay-in fahukmuhuila Allahi thalikumu Allahu rabbeeAAalayhi tawakkaltu wa-ilayhi oneeb

And in anything over which you disagree - its ruling is [to be referred] to Allāh. [Say], "That is Allāh, my Lord; upon Him I have relied, and to Him I turn back."

And (Say O prophet to your opponents,) “Whatever dispute you have in any matter, its judgment lies with Allah. That One is Allah, the Lord of mine; in Him alone I have placed my trust, and to Him alone I turn (in every matter).”