39:65
وَلَقَدْ أُوحِىَ إِلَيْكَ وَإِلَى ٱلَّذِينَ مِن قَبْلِكَ لَئِنْ أَشْرَكْتَ لَيَحْبَطَنَّ عَمَلُكَ وَلَتَكُونَنَّ مِنَ ٱلْخَـٰسِرِينَ
walaqad ūḥiya ilayka wa-ilā alladhīna min qablika la-in ashrakta layaḥbaṭanna ʿamaluka walatakūnanna mina l-khāsirīna
It has already been revealed to you [Prophet] and to those before you: ‘If you ascribe any partner to God, all your work will come to nothing: you will be one if the losers.
And indeed it has been revealed to you (O Muhammad صلى الله عليه وسلم), as it was to those (Allâh’s Messengers) before you: "If you join others in worship with Allâh, (then) surely (all) your deeds will be in vain, and you will certainly be among the losers."