From Sahih Muslim (Hadith 6304):
A'isha, the wife of Allah's Apostle (ﷺ), reported that Allah's Messenger (ﷺ) 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
Reference: Muslim 6304