Sahih Bukhari
Good Manners and Form (Al-Adab)
Volume: 008 / Book Number: 073 / Hadith Number: 218
Narrated Abu Musa:
I got a son and I took him to the Prophet who named him Ibrahim, and put in his mouth the juice of a date fruit (which be himself had chewed?, and invoked for Allah's blessing upon him, and then gave him back to me. He was the eldest son of Abii Musa.