Al-Bara' :
"We used to say that the participants of Badr on the Day of Badr were like the number of companions of Talut, three hundred and thirteen men."
[He said:] There is something on this topic from Ibn 'Abbas.
[Abu 'Eisa said:] This Hadith is Hasan Sahih. Ath-Thawri and others reported it from Abu Ishaq.