وَلَقَد أوحِيَ إِلَيكَ وَإِلَى الَّذينَ مِن قَبلِكَ لَئِن أَشرَكتَ لَيَحبَطَنَّ عَمَلُكَ وَلَتَكونَنَّ مِنَ الخاسِرينَ

It was revealed to you and those before you that if you associate, your deeds will be nullified, and you will be among the losers.