General Behavior (Kitab Al-Adab)
43/123. Chapter:
When one man loves another because of some good that he sees
Sunan Abi Dawud
حَدَّثَنَا مُسْلِمُ بْنُ إِبْرَاهِيمَ، حَدَّثَنَا الْمُبَارَكُ بْنُ فَضَالَةَ، حَدَّثَنَا ثَابِتٌ الْبُنَانِيُّ، عَنْ أَنَسِ بْنِ مَالِكٍ، أَنَّ رَجُلاً، كَانَ عِنْدَ النَّبِيِّ صلى الله عليه وسلم فَمَرَّ بِهِ رَجُلٌ فَقَالَ يَا رَسُولَ اللَّهِ إِنِّي لأُحِبُّ هَذَا . فَقَالَ لَهُ النَّبِيُّ صلى الله عليه وسلم " أَعْلَمْتَهُ " . قَالَ لاَ قَالَ " أَعْلِمْهُ " . قَالَ فَلَحِقَهُ فَقَالَ إِنِّي أُحِبُّكَ فِي اللَّهِ . فَقَالَ أَحَبَّكَ الَّذِي أَحْبَبْتَنِي لَهُ .
Narrated Anas ibn Malik: A man was with the Prophet (ﷺ) and a man passed by him and said: Messenger of Allah! I love this man. The Messenger of Allah (ﷺ) then asked: Have you informed him? He replied: No. He said: Inform him. He then went to him and said: I love you for Allah's sake. He replied: May He for Whose sake you love me love you!
Reference : Sunan Abi Dawud 5125In-book reference : Book 43, Hadith 353English translation : Book 42, Hadith 5106