(248) بَابُ إِذَا أَحَبَّ الرَّجُلُ أَخَاهُ فَلْيُعْلِمْهُ
Mujahid said, "One of the Companions of the Prophet, may Allahbless him and grant him peace, met me and took hold of my shoulder frombehind. He said, 'I love you,' and he went on to say, 'The One for whosesake I love you loves you.' He continued, 'If it had not been that theMessenger of Allah, may Allah bless him and grant him peace, said, "Whena man has love for another man, he should tell him that he loves him,"I would not have told you.'"
Reference: Al-Adab Al-Mufrad 543
In-book reference: Book 30, Hadith 6
English translation: Book 30, Hadith 543