Musannaf Ibn Abi Shayba 33:7

Waki’ narrated to us, from Sufyan, from Mansur, from Salim, who said: Isa ibn Maryam said: "Fear Allah and work for Allah, and do not work for your bellies. Look at these birds; they do not harvest and they do not sow, yet Allah provides for them. If you claim that your bellies are greater than the bellies of the birds, then these cattle and donkeys do not plow and do not sow, yet Allah provides for them. And beware of the excess of the world, for it is filth in the sight of Allah."