17 “For mine are all the beasts of the wood”. Why should I ask of you what I have made? Is it more yours, to whom I have given it to possess, than Mine, who have made it? “For mine are all the beasts of the wood.” But perchance that Israel says, The beasts are God's, those wild beasts which I enclose not in my pen, which I bind not to my stall; but this ox and sheep and he-goat— these are my own. “Cattle on the mountain, and oxen.” Mine are those which you possess not, Mine are these which you possess. For if you are My servant, the whole of your property is Mine. For it cannot be, that is the property of the master which the servant has gotten to himself, and yet that not be the property of the Master which the Master Himself has created for the servant. Therefore Mine are the beasts of the wood which you have not taken; Mine are also the cattle on the mountains which are yours, and the oxen which are at your stall: all are My own, for I have created them.
Source: The Enarrations, or Expositions, on the Psalms (New Advent)