مسند أحمد

It was narrated that al-Ash'ath bin Qais said : I visited 'Umar and he reached out and hit his wife. He said : O: Ash'ath, learn from me three things that I learned from the Messenger of Allah (ﷺ) ﷺ: Do not ask a man why he hit his wife, do not sleep until you pray Witr - and I forgot the third thing