Aslam said, "'Umar said to me, 'If I send you to a man, do nottell him why I sent you to him. If you do, Shaytan will prepare a lie forhim in that.'" (JA)
English reference (JA): Book 47, Hadith 1156 (JA)
Arabic reference (JA): Book 1, Hadith 1156 (JA)