It was narrated from Ibn 'Abbas that:
The Prophet got up during the night and went to the toilet and relieved himself, then he washed his face and hands, and went back to sleep. (Sahih)Another chain with similar wording. (DE)
English reference (DE): Vol. 1, Book 1, Hadith 508 (DE)
Arabic reference (DE): Book 1, Hadith 547 (DE)