(4) باب الْغَيْرَةِ
It was narrated that 'Aishah said:
"I noticed that the Messenger of Allah was not there one night, and I thought that he had gone to one of his other wives, so I reached out for him, and found him bowing or prostrating, and saying: 'Subhanaka wa bi hamdika la ilaha illa anta (Glory and praise be to You, there is none worthy of worship but You).' I said: 'May my father and mother be sacrificed for you; you were doing one thing, and I was thinking of something else.'"
Reference: Sunan an-Nasa'i 3961
In-book reference: Book 36, Hadith 23
English translation: Vol. 4, Book 36, Hadith 3413