Dua of Prophet at Battle of Badr

اَللَّهُمَّ أَنْجِزْ لِي مَا وَعَدْتَنِي اَللَّهُمَّ آتِ مَا وَعَدْتَنِي اَللَّهُمَّ إِنْ تُهْلِكْ هَذِهِ الْعِصَابَةَ مِنْ أَهْلِ الْإِسْلَامِ لَا تُعْبَدُ فِي الْأَرْضِ

Transliteration

Allaahumma anjiz li ma wa ‘adtani, Allaahumma aati ma wa ‘adtani, Allaahumma in tuhlik hadhi-hil 'ishabata min ahlil Islaami, la tu'badu fil ardi

Meaning

O Allah! Fulfill what You promised for me. [O Allah! Bring about what You promised for me] O Allah! If you destroy this band of adherents to Islam, you will not be worshiped upon the earth.

Source: Muslim: 1763