It is narrated from Sayyiduna Abu Umamah (may Allah be pleased with him) that he said: The Prophet (peace and blessings be upon him) came out to some elders of the Ansar whose beards were white, and he said: "O assembly of the Ansar! Dye (the hair of your beards) red or yellow, and differ from the People of the Book." The narrator says: We said: "O Messenger of Allah, the People of the Book wear trousers and do not wear the lower wrap (izar)?" The Prophet (peace and blessings be upon him) said: "Wear trousers and also wear the lower wrap, and differ from the People of the Book!" We said: "O Messenger of Allah, the People of the Book wear leather socks (khuffs) and do not wear sandals." The Prophet (peace and blessings be upon him) said: "Wear leather socks and also wear sandals, and differ from the People of the Book!" We said: "O Messenger of Allah, the People of the Book trim their beards and let their moustaches grow long." Then the Prophet (peace and blessings be upon him) said: "Trim your moustaches and let your beards grow, and differ from the People of the Book."
Imam Ahmad and Imam al-Tabarani recorded it. The narrators of Imam Ahmad are the narrators of the Sahih, except al-Qasim, and he is thiqah (trustworthy); some criticism has been made of him that is not harmful.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب اللباس / 8576
Hadith Gradingمحدثین:إسنادہ صحیح
Hadith Takhrij«اخرجه الطبراني فى المعجم الكبير (7924) اخرجه احمد فى المسند (5264) ، أخرجه مسند أحمد برقم: 21780، وأخرجه المعجم الكبير للطبراني برقم: 7924»