The Prophet (sallahualayhiwasallam) said:

“The best of you are those who are the best to their wives; and I am the best of you to my wives.” (Tirmidhi 3895. Declared authentic by Imaam Albaani in Sahih at-Tirmidhi)

The Prophet (sallahualayhiwasallam) said:

“You never spend anything, except that you will be rewarded for it; even the morsel of food that you lift to your wife’s mouth” (Bukhaari 6352 & Muslim 1628)