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‘A’isha reported God’s Messenger as saying, “Among the believers who show most perfect faith are those who have the best disposition, and are kindest to their families." Tirmidhi transmitted it.
Source: sunnah.com
Other translations
Arabic
وَعَن عَائِشَة رَضِي الله عَنهُ قَالَتْ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسلم: «إِنَّ مِنْ أَكْمَلِ الْمُؤْمِنِينَ إِيمَانًا أَحْسَنُهُمْ خُلُقًا وألطفهم بأَهْله» . رَوَاهُ التِّرْمِذِيّ
sunnah.com