Imam Ahmad recorded that Sa`d bin Malik said, "I said, `O Allah's Messenger, Allah has brought comfort to me today over the idolators, so grant me this sword.' He said,

آ«ط¥ظگظ†ظ‘ظژ ظ‡ظژط°ظژط§ ط§ظ„ط³ظ‘ظژظٹظ’ظپظژ ظ„ظژط§ ظ„ظژظƒظژ ظˆظژظ„ظژط§ ظ„ظگظٹطŒ ط¶ظژط¹ظ’ظ‡آ»

(This sword is neither yours nor mine; put it down.) So I put it down, but said to myself, `The Prophet might give this sword to another man who did not fight as fiercely as I did.' I heard a man calling me from behind and I said, `Has Allah revealed something in my case' The Prophet said,

آ«ظƒظڈظ†ظ’طھظژ ط³ظژط£ظژظ„ظ’طھظژظ†ظگظٹ ط§ظ„ط³ظ‘ظژظٹظ’ظپظژ ظˆظژظ„ظژظٹظ’ط³ظژ ظ‡ظڈظˆظژ ظ„ظگظٹطŒ ظˆظژط¥ظگظ†ظ‘ظژظ‡ظڈ ظ‚ظژط¯ظ’ ظˆظڈظ‡ظگط¨ظژ ظ„ظگظٹطŒ ظپظژظ‡ظڈظˆ ظ„ظژظƒآ»

(You asked me to give you the sword, but it is not for me to decide about. However, it has been granted to me (by Allah), and I give it to you.) So Allah sent down this Ayah,

﴿ظٹظژط³ظ’ط£ظژظ„ظڈظˆظ†ظژظƒظژ ط¹ظژظ†ظگ ط§ظ„ط£ظژظ†ظپظژط§ظ„ظگ ظ‚ظڈظ„ظگ ط§ظ„ط£ظژظ†ظپظژط§ظ„ظڈ ظ„ظگظ„ظ‘ظژظ‡ظگ ظˆظژط§ظ„ط±ظ‘ظژط³ظڈظˆظ„ظگ﴾

(They ask you about Al-Anfal. Say: "Al-Anfal are for Allah and the Messenger'').

Abu Dawud, At-Tirmidhi and An-Nasa'i collected this Hadith, At-Tirmidhi said, "Hasan Sahih''.