Surah Al-Nahl (The Bees), Verse 2

یُنَزِّلُ الْمَلٰٓىِٕكَةَ بِالرُّوْحِ مِنْ اَمْرِهٖ عَلٰی مَنْ یَّشَآءُ مِنْ عِبَادِهٖۤ اَنْ اَنْذِرُوْۤا اَنَّهٗ لَاۤ اِلٰهَ اِلَّاۤ اَنَا فَاتَّقُوْنِ ۟

Yunazzilul malaaa 'ikata birroohi min amrihee 'alaa mai yashaaa'u min 'ibaadiheee an anzirooo annahoo laaa ilaaha illaaa ana fattaqoon

“He doth send down His angels with inspiration of His Command, to such of His servants as He pleaseth, (saying): "Warn (Man) that there is no god but I: so do your duty unto Me."”

Quran 16:2 (Yusuf Ali Translation)