Surat Az-Zumar (The Groups) - الزمر

وَلَقَدْ أُوحِىَ إِلَيْكَ وَإِلَى ٱلَّذِينَ مِن قَبْلِكَ لَئِنْ أَشْرَكْتَ لَيَحْبَطَنَّ عَمَلُكَ وَلَتَكُونَنَّ مِنَ ٱلْخَٰسِرِينَ ﴿٦٥﴾

And certainly, it has been revealed to you and to those before you: Surely if you associate (with Allah), your work would certainly come to naught and you would certainly be of the losers.