Silsilat al-Ahadith al-Sahihah

Sayyiduna Rafi‘ bin Khadij (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) was asked: “Which earning is the best (and purest)?” He (peace and blessings be upon him) replied: “A man’s work with his own hand and every honest sale is the best earning.”