Surah Al-An'am, Verse 88

ذَٰلِكَ هُدَى ٱللَّهِ يَهۡدِي بِهِۦ مَن يَشَآءُ مِنۡ عِبَادِهِۦۚ وَلَوۡ أَشۡرَكُواْ لَحَبِطَ عَنۡهُم مَّا كَانُواْ يَعۡمَلُونَ٨٨

dhālika hudā l-lahi yahdī bihi man yashāu min ʿibādihi walaw ashrakū laḥabiṭa ʿanhum mā kānū yaʿmalūna

That is the guidance of Allāh by which He guides whomever He wills of His servants. But if they had associated others with Allāh, then worthless for them would be whatever they were doing.