Sunan Abu Dawud 5124
General Behavior (Kitab Al-Adab)
حَدَّثَنَا مُسَدَّدٌ، حَدَّثَنَا يَحْيَى، عَنْ ثَوْرٍ، قَالَ حَدَّثَنِي حَبِيبُ بْنُ عُبَيْدٍ، عَنِ الْمِقْدَامِ بْنِ مَعْدِيكَرِبَ، - وَقَدْ كَانَ أَدْرَكَهُ - عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ " إِذَا أَحَبَّ الرَّجُلُ أَخَاهُ فَلْيُخْبِرْهُ أَنَّهُ يُحِبُّهُ " .
Narrated Al-Miqdam ibn Ma'dikarib: The Prophet (ﷺ) said: When a man loves his brother, he should tell him that he loves him
Grading: Al-Albani: Sahih · Muhammad Muhyi Al-Din Abdul Hamid: Sahih · Zubair Ali Zai: Isnaad Hasan
Text from the public-domain hadith-api dataset. Numbering follows that dataset and can differ by a few from some printed editions — check the wording, not only the number.