No one has ever eaten food better than that which his hands have earned. Indeed, Prophet Dawūd (peace be upon him) used to eat from the earnings of his own hands

Explanation

The Prophet (may Allah's peace and blessings be upon him) informed us that Dawūd (peace be upon him) used to eat only from the earnings of his labor. He was a craftsman who was good at making shields and other fighting tools. Since the prophets (peace be upon them) used to work and eat from the earnings of their labor, whether that consisted of craftsmanship, agriculture, sheep herding, etc. This is altogether the reason why those who are of a lesser rank are more required to earn through their own labor and avoid the embarrassment of having to ask people for money.