Sacrifice on Occasion of Birth (`Aqiqa)
Bukhari :: Book 7 :: Volume 66 :: Hadith 376
Narrated Abu Musa:
A son was born to me and I took him to the Prophet who named him Ibrahim, did Tahnik for him with a date, invoked Allah to bless him and returned him to me. (The narrator added: That was Abu Musa's eldest son.)