It is narrated from Abu Najih al-Sulami (may Allah be pleased with him) that he said: We besieged the fortress of Ta'if with the Messenger of Allah (peace and blessings be upon him), and I heard the Messenger of Allah (peace and blessings be upon him) say: "Whoever shoots an arrow (at the enemy) will have a rank in Paradise." So that day I shot sixteen arrows. And I heard the Messenger of Allah (peace and blessings be upon him) say: "Whoever shoots an arrow in the path of Allah, it is equal to freeing a slave; and whoever's hair turns white while in Islam, it will be a light for him on the Day of Resurrection; and any man who frees a Muslim man, Allah Almighty will make every bone of him (the freed slave) a means of protecting every bone of him (the one who freed him) from the Fire; and any Muslim woman who frees a Muslim woman, Allah Almighty will make every bone of her (the freed woman) a means of protection from the Fire for every bone of her (the one who freed her)." This hadith is sahih (authentic) with a high ('ali) chain of narration, but the two Shaykhs (Bukhari and Muslim) did not record it.