حَدَّثَنَا نَصْرُ بْنُ بَابٍ عَنِ الْحَجَّاجِ عَنِ الْحَكَمِ عَنْ مِقْسَمٍ عَنِ ابْنِ عَبَّاسٍ أَنَّهُ قَالَ إِنَّ أَهْلَ بَدْرٍ كَانُوا ثَلَاثَ مِائَةٍ وَثَلَاثَةَ عَشَرَ رَجُلًا وَكَانَ الْمُهَاجِرُونَ سِتَّةً وَسَبْعِينَ وَكَانَ هَزِيمَةُ أَهْلِ بَدْرٍ لِسَبْعَ عَشْرَةَ مَضَيْنَ يَوْمَ الْجُمُعَةِ فِي شَهْرِ رَمَضَانَ
مسند امام احمد بن حنبل · Hadith 2232
It was narrated from Ibn "Abbas (RA) that he said: The people of Badr were three hundred and thirteen men, the Muhajireen were seventy six, and the defeat of the people of Badr was on Friday the seventeenth of Ramadan.
Translated by Dr. Muhammad Muhsin Khan · Reviewed by Islamic University of Madinah · Published March 2020