Jumay' bin Umayr narrates from his maternal uncle Abu Burdah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) was asked which earning is the purest, or he asked: the best? He said: "A man's work with his own hand, and a sale conducted with honest intent."
Sharik bin Abdullah al-Qadi narrated it this way and erred in it in two places: one is his saying "Jumay' bin Umayr", whereas it is only Sa'id bin Umayr; and the other is in connecting its chain, whereas others narrated it from Wa'il as mursal.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 10397