It is narrated from Sayyiduna Abu Burdah bin Niyar (may Allah be pleased with him), who was a Companion; he said: the Messenger of Allah (peace and blessings be upon him) was asked: O Messenger of Allah, which earning is best? He (peace and blessings be upon him) said: "A man's work with his own hand."
Hadith Referenceالمعجم الكبير للطبراني / باب الهاء / 18739