Surah Al-An'am (The Cattle), Verse 88

ذٰلِكَ هُدَی اللّٰهِ یَهْدِیْ بِهٖ مَنْ یَّشَآءُ مِنْ عِبَادِهٖ وَلَوْ اَشْرَكُوْا لَحَبِطَ عَنْهُمْ مَّا كَانُوْا یَعْمَلُوْنَ ۟

Zaalika hudal laahi yahdee bihee mai yashaaa'u min 'ibaadih; wa law ashrakoo lahabita 'anhum maa kaanoo ya'maloon

“This is the guidance of Allah: He giveth that guidance to whom He pleaseth, of His worshippers. If they were to join other gods with Him, all that they did would be vain for them.”

Quran 6:88 (Yusuf Ali Translation)