Ash-Shura · 42:10

10. Whatever you, O People, differ in about the principle and secondary matters of your religion, the judgement for that rests with Allah, and His book and the tradition of His Messenger (peace be upon him) must be used as a reference. The One who possesses these attributes is my Lord. It is on Him that I rely in all my affairs and it is to Him that I turn by repenting to Him.