Riyad as-Salihin 540
Abu Hurairah (May Allah be pleased with him) reported:
The Prophet (ﷺ) said, "(Prophet) Dawud (ﷺ) ate only out of that which he earned through his manual work." [Al-Bukhari] .
وعنه عن النبي صلى الله عليه وسلم  قال‏:‏ ‏
"‏كان داود عليه السلام لا يأكل إلا من عمل يده‏"‏‏.‏ ‏(‏‏(‏رواه البخاري‏)‏‏)‏‏.‏