Sayyidah Umm al-Darda' (may Allah be pleased with her) relates: Whenever Sayyiduna Abu al-Darda' (may Allah be pleased with him) said anything, he would keep smiling while saying it. I said to him: "I fear that people may consider you foolish." He said: "Whenever the Prophet (peace and blessings be upon him) said anything, he would keep smiling while saying it."
Imam Ahmad and Imam Tabarani in al-Mu'jam al-Kabir recorded it; its chain contains a narrator, Habib bin Amr. Imam Daraqutni (may Allah have mercy on him) says: He is majhul (unknown).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب العلم / 549
Hadith Gradingمحدثین:إسنادہ ضعیف
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