Hazrat Khaythama narrates that Isa ibn Maryam (peace be upon him) said: "Do not store up today’s provision for tomorrow. For the One who provided today can also provide tomorrow. If you wonder how this is possible, look at the birds: they neither plow nor sow, yet they go out in the morning and return in the evening with Allah’s provision. And if you say that the example of birds is not sufficient, then look at the wild donkeys and the nilgai; they go out in the morning seeking Allah’s provision and return in the evening satisfied."