16 As yet that Israel perchance does not understand what are the holocausts thereof which He has in His sight always, and is still thinking of oxen, of sheep, of he-goats: let it not so think: “I will not accept calves of your house.” Holocausts I named; at once in mind and thought to earthly flocks you were running, therefrom you were selecting for Me some fat thing: “I will not accept calves of your house.” He is foretelling the New Testament, wherein all those sacrifices have ceased. For they were then foretelling a certain Sacrifice which was to be, with the Blood whereof we should be cleansed. “I will not accept calves of your house, nor he-goats of your flocks.”
Source: The Enarrations, or Expositions, on the Psalms (New Advent)