Rather it was said by Paul or not there's not really new covenant.Things are said in the old testament like the just shall live by faith and of course he desires mercy and not sacrifice.Even to be nice to your enemy
What is that “new covenant”?
Heb 9:16-28.
Jer 33…”31 “Behold, days are coming,” declares the Lord, “when I will make a new covenant with the house of Israel and the house of Judah, 32 not like the covenant which I made with their fathers on the day I took them by the hand to bring them out of the land of Egypt, My covenant which they broke, although I was a husband to them,” declares the Lord.33 “For this is the covenant which I will make with the house of Israel after those days,” declares the Lord: “I will put My law within them and write it on their heart; and I will be their God, and they shall be My people. 34 They will not teach again, each one his neighbor and each one his brother, saying, ‘Know the Lord,’ for they will all know Me, from the least of them to the greatest of them,” declares the Lord, “for I will forgive their wrongdoing, and their sin I will no longer remember.”…”