Az-Zumar (The Troops)

Surah 39 · Verse 65

And it has been communicated to you and those before you: If you associate partners (with Allah), your work will definitely become fruitless and you will definitely be among the losers.

وَلَقَدْ أُوحِيَ إِلَيْكَ وَإِلَى الَّذِينَ مِنْ قَبْلِكَ لَئِنْ أَشْرَكْتَ لَيَحْبَطَنَّ عَمَلُكَ وَلَتَكُونَنَّ مِنَ الْخَاسِرِينَ