عَنْ رَافِعِ بْنِ خَدِيجٍ رَضِيَ اللَّهُ عَنْهُ قَالَ قِيلَ يَا رَسُولَ اللَّهِ أَيُّ الْكَسْبِ أَطْيَبُ قَالَ عَمَلُ الرَّجُلِ بِيَدِهِ وَكُلُّ بَيْعٍ مَبْرُورٍ
It is narrated from Sayyiduna Rafi' bin Khadij (may Allah be pleased with him) that it was asked from the Noble Prophet (peace and blessings be upon him): O Messenger of Allah! Which earning is the purest? He replied: A man's earning from his own hand and every blessed (honest) trade.