Sahih Bukhari Volume 5, Book 57, Hadith Number 112.

Narated By Abu Salama : ‘Aisha said, “Once Allah’s Apostle said (to me), ‘O Aish (‘Aisha)! This is Gabriel greeting you.’ I said, ‘Peace and Allah’s Mercy and Blessings be on him, you see what I don’t see’ ” She was addressing Allah ‘s Apostle.