Sahih Bukhari | Volume 5 | Hadith Number 604

Narrated by Ismail
I saw (a healed scar of) blow over the hand of Ibn Abi Aufa who said, "I received that blow in the battle of Hunain in the company of the Prophet." I said, "Did you take part in the battle of Hunain?" He replied, "Yes (and in other battles) before it."