Prophet pleaded for help in the battle of Badr

إِذْ تَسْتَغِيثُونَ رَبَّكُمْ فَٱسْتَجَابَ لَكُمْ أَنِّى مُمِدُّكُم بِأَلْفٍۢ مِّنَ ٱلْمَلَٰٓئِكَةِ مُرْدِفِينَ

Remember ye implored the assistance of your Lord, and He answered you: "I will assist you with a thousand of the angels, ranks on ranks."