Abu Dawud Book 5, Hadith Number 2138.

Narated By Mu’awiyah ibn Haydah : I said: Apostle of Allah, how should we approach our wives and how should we leave them? He replied: Approach your tilth when or how you will, give her (your wife) food when you take food, clothe when you clothe yourself, do not revile her face, and do not beat her.