´It was narrated that Anas said:` "Every time we wanted to see the Messenger of Allah (ﷺ) praying at night we saw him, and every time we wanted to see him sleeping, we saw him."
Hadith Referenceسنن نسائي / كتاب قيام الليل وتطوع النهار / 1628
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:صحيح بخاري
1؎ : The meaning is that he would sleep during the night as well as perform prayer; he would neither stay awake the entire night, nor would he sleep the entire night.