Sahih al-Bukhari 7231

'Abdullah ibn 'Amir ibn Rabi'a said that 'A'isha said, "One night the Prophet, may Allah bless him and grant him peace, could not sleep and said, 'Would that a righteous man from my Companions would guard me tonight!' Then we heard the sound of weapons and he said, 'Who is it?' It as said, 'Sa'd, Messenger of Allah! I have come to guard you.' The Messenger of Allah, may Allah bless him and grant him peace, slept so that we heard his snoring." Abu 'Abdullah [al-Bukhari] said that 'A'isha said, "Bilal said: 'Would that I knew whether I would spend a night in the valley of Makka with the sweet rushes and panic grass around me!' I told the Prophet, may Allah bless him and grant him peace."