Surah Al-Anfal, Verse 9

إِذۡ تَسۡتَغِيثُونَ رَبَّكُمۡ فَٱسۡتَجَابَ لَكُمۡ أَنِّي مُمِدُّكُم بِأَلۡفٖ مِّنَ ٱلۡمَلَٰٓئِكَةِ مُرۡدِفِينَ٩

idh tastaghīthūna rabbakum fa-is'tajāba lakum annī mumiddukum bi-alfin mina l-malāikati mur'difīna

[Remember] when you were asking help of your Lord, and He answered you, "Indeed, I will reinforce you with a thousand from the angels, following one another."