Surah An-Nahl, Verse 102

قُلۡ نَزَّلَهُۥ رُوحُ ٱلۡقُدُسِ مِن رَّبِّكَ بِٱلۡحَقِّ لِيُثَبِّتَ ٱلَّذِينَ ءَامَنُواْ وَهُدٗى وَبُشۡرَىٰ لِلۡمُسۡلِمِينَ١٠٢

qul nazzalahu rūḥu l-qudusi min rabbika bil-ḥaqi liyuthabbita alladhīna āmanū wahudan wabush'rā lil'mus'limīna

Say, [O Muḥammad], "The Pure Spirit [i.e., Gabriel] has brought it down from your Lord in truth to make firm those who believe and as guidance and good tidings to the Muslims."