Charles H. Spurgeon on Psalms 145:15

(second clause.) It is said that God gives them "their food", and, "in its season", for the very variety of it serves more to illustrate the providence of God. Each has its own way of feeding, and the different kinds of aliment are designed and adapted for different uses. David therefore speaks of the food which is particular to them. The pronoun is not in the plural, and we are not to read in their season, as if it applied to the animals. The food he notices as given in its season; for here also we are to notice the admirable arrangements of divine providence, that there is a certain time appointed for harvest, vintage, and hay crop, and that the year is so divided into intervals, that the cattle are fed at one time on grass, at another on hay, or straw, or acorns, or other products of the earth. Were the whole supply poured forth at one and the same moment, it could not be gathered together so conveniently; and we have no small reason to admire the seasonableness with which the different kinds of fruit and aliment are yearly produced. —John Calvin.