The Messenger of Allah ﷺ said, "The best of earnings is that of a worker who earns with his own hands, when he is sincere in his work."
حدثنا إسحاق حدثنا محمد بن عمار مؤذن مسجد رسول الله ﷺ قال سمعت سعيدا المقبري يقول سمعت
قال رسول الله ﷺ إن خير الكسب كسب يدي عامل إذا نصح
Suyuti narrated it in Jami Saghir, and marked it as hasan. He mentioned it with the wording, "the best of earnings," and the hadith is a repetition of number 8393.