It’s Sunnah! The Sunnah of our beloved Prophet Muhammad (peace and blessings be upon him). A Life of joy and full of love has to be the goal of a married couple. In order to achieve it, both husband and wife have to make a lot of compromises and of course make an effort to be kind to each other. But here, especially the husband is being held to be nice to his wife:
Al-Tirmidhi Hadith 628 Narrated by Abu Hurayrah
The Prophet (saws) said: Among the Muslims the most perfect, as regards his faith, is the one whose character is excellent, and the best among you are those who treat their wives well.
and the holy Qur’an:
‘’Live with them (your wives) in kindness; even if you dislike them, perhaps you dislike something in which Allah has placed much good’’ [Qur’an 4:19]
Hopefully the importance of this matter is conveyed.
So dear Brothers, make an effort and be kind to your wives, it’s Sunnah!