كتاب المقدمات
The Book of Miscellany
(73)
Chapter: Good Conduct
(73)
- باب حسن الخلق
Riyad as-Salihin 627
Abu Hurairah (May Allah be pleased with him) reported:
Messenger of Allah (ﷺ) said, "The most perfect man in his faith among the believers is the one whose behaviour is most excellent; and the best of you are those who are the best to their wives."

[At- Tirmidhi, who classified it as Hadith Hasan Sahih].

وعنه قال رسول الله صلى الله عليه وسلم‏:‏ “أكمل المؤمنين إيماناً أحسنهم خلقاً وخياركم خياركم لنسائهم”‏.‏ ‏(‏‏(‏رواه الترمذي وقال‏:‏ حديث حسن صحيح‏)‏‏)‏‏.‏
Reference : Riyad as-Salihin 627
In-book reference : Introduction, Hadith 627