The Messenger of Allah ﷺ said, "The finest food a man eats is from his own earnings, and his child is from his earnings."
أخبرنا يوسف بن عيسى قال أنبأنا الفضل بن موسى قال أنبأنا الأعمش عن إبراهيم عن الأسود
قال رسول الله ﷺ إن أطيب ما أكل الرجل من كسبه وولده من كسبه
[Sahih] Ibn Majah reported it in the Book of Trade, chapter on encouragement to earn a livelihood, no. 2137, from the hadith of Amash with this wording, and it is in al-Kubra, no. 6040. Ibn Hibban graded it sahih, no. 1092, 1093, and it has very many corroborating narrations.