﴿ إِذْ تَقُولُ لِلْمُؤْمِنِينَ أَلَن يَكْفِيَكُمْ أَن يُمِدَّكُمْ رَبُّكُم بِثَلَٰثَةِ ءَالَٰفٍۢ مِّنَ ٱلْمَلَٰٓئِكَةِ مُنزَلِينَ ﴾

“[And remember] when thou didst say unto the believers: "Is it not enough for you [to know] that your Sustainer will aid you with three thousand angels sent down [from on high]?”

Please check ayah 3:129 for complete tafsir.