Sahih Bukhari
Beginning of Creation
Volume: 004 / Book Number: 054 / Hadith Number: 440
Narrated Abu Salama:
'Aisha said that the Prophet said to her "O 'Aisha' This is Gabriel and he sends his (greetings) salutations to you." 'Aisha said, "Salutations (Greetings) to him, and Allah's Mercy and Blessings be on him," and addressing the Prophet she said, "You see what I don't see."