Al-Anfal 8:9

Ith tastagheethoona rabbakum fastajabalakum annee mumiddukum bi-alfin mina almala-ikatimurdifeen

[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."

When you were calling your Lord for help, so He responded to you (saying): “I am going to support you with one thousand of the angels, one following the other.”