Surah Ali'Imran, Verse 124

إِذۡ تَقُولُ لِلۡمُؤۡمِنِينَ أَلَن يَكۡفِيَكُمۡ أَن يُمِدَّكُمۡ رَبُّكُم بِثَلَٰثَةِ ءَالَٰفٖ مِّنَ ٱلۡمَلَٰٓئِكَةِ مُنزَلِينَ١٢٤

idh taqūlu lil'mu'minīna alan yakfiyakum an yumiddakum rabbukum bithalāthati ālāfin mina l-malāikati munzalīna

[Remember] when you said to the believers, "Is it not sufficient for you that your Lord should reinforce you with three thousand angels sent down?