Psalms 51:19 - Joseph Benson’s Commentary on the Old and New Testaments

Then When thou hast granted my humble requests, expressed in the former verses; when thou hast renewed, and pardoned, and comforted me, and restored thy favour unto thy people and this city; shalt thou be pleased with the sacrifices of righteousness Which I and my people, being justified and reconciled to thee, shall offer with sincere and penitent hearts. These are opposed to the sacrifices of the wicked, which God abhors, Proverbs 15:8; Isaiah 1:11; and, withal, by thus speaking, he intimates that God, for their sins, might justly now reject their sacrifices as not being, properly speaking, sacrifices of righteousness, because they who offered them were not righteous. Then shall they, &c. That is, they who, by thy appointment, are to do that work, namely, the priests in the name and on the behalf of thy people. Offer bullocks upon thine altar The best and most costly sacrifices, and that in great numbers, in testimony of their gratitude for thy great favour, in pardoning mine and their sins, and preventing that total ruin which we had reason to expect and fear upon that account.