A long hadith is reported from Sayyiduna Abu Ayyub al-Ansari (may Allah be pleased with him), in which he narrates: The Prophet (peace and blessings be upon him) said: "They, meaning the polytheists, (how many are they?) Come, so that we may count ourselves too (to see how many we are)." (The narrator says:) We were three hundred and thirteen men. We informed the Prophet (peace and blessings be upon him) of this and he was pleased by it; he praised Allah Almighty and said: "This is the number of the companions of Talut." After this the narrator mentioned the whole hadith.
This narration has already passed at the beginning of the chapter on the battle of Badr, along with the discussion of it.