Sahih Muslim
The Book Pertaining to the Merits of the Companions (Allah Be Pleased With Them) of the Holy Prophet (May Peace Be Upon Him) (Kitab Al-Fadail Al-Sahabah)
Book Number: 031 / Hadith Number: 5997
'A'isha, the wife of Allah's Apostle (may peace be upon him), reported that Allah's Messenger (may peace be upon him) said: 'A'isha, here is Gabriel offering you greetings. She said: 1 made a reply: Let there be peace and blessings of Allah upon him, and added: He sees what I do not see.