You wrote:
You continue to make the assertion I have underlined in your quote. What is your authority for this? Please show us where you get this; it sounds like something from a secular source.Why was it "required"? Did those blood sacrifices make the people righteous? "Sacrifice and offering you did not require, but an open ear" ---- an open ear to hear what God says, and to do it.
The practice is ancient all right. The heathen from virtually every nation sacrificed to their gods to appease the wrath of these gods. The Jews imported the practice into their own religion. God hadn't said a word to the Israelites about sacrifice when He brought them out of Egypt:
The practice of blood sacrifice is indeed ancient, doubtless as old as the Fall.
Genesis 4:4 (New International Version)
4. But Abel brought fat portions from some of the firstborn of his flock. The LORD looked with favor on Abel and his offering,
Genesis 8:20 (New International Version)
20. Then Noah built an altar to the LORD and, taking some of all the clean animals and clean birds, he sacrificed burnt offerings on it.
Job 1:5 (New International Version)
5. When a period of feasting had run its course, Job would send and have them purified. Early in the morning he would sacrifice a burnt offering for each of them, thinking, "Perhaps my children have sinned and cursed God in their hearts." This was Job's regular custom.
So we see righteous men, long before there was an Israel, offering blood sacrifices to God. And we also find God, long before Israel, commanding it:
Job 42:7-8 (New International Version)
7. After the LORD had said these things to Job, he said to Eliphaz the Temanite, "I am angry with you and your two friends, because you have not spoken of me what is right, as my servant Job has. 8. So now take seven bulls and seven rams and go to my servant Job and sacrifice a burnt offering for yourselves. My servant Job will pray for you, and I will accept his prayer and not deal with you according to your folly. You have not spoken of me what is right, as my servant Job has."
How did these ancient people know God required these sacrifices? Although we read little of what God commanded in these ancient times, we can be certain they received commandments prior to Moses, for Job says:
Job 23:12 (New International Version)
12. I have not departed from the commands of his lips;
I have treasured the words of his mouth more than my daily bread.
And are we to believe God accepted sacrifice that He had not commanded, for which there was no divine warrent? I think not:
Leviticus 10 (New International Version)
1. Aaron's sons Nadab and Abihu took their censers, put fire in them and added incense; and they offered unauthorized fire before the LORD, contrary to his command. 2. So fire came out from the presence of the LORD and consumed them, and they died before the LORD.
You continually quote David:
Psalm 40:6 (New International Version)
6. Sacrifice and offering you did not desire,
but my ears you have pierced;
burnt offerings and sin offerings
you did not require.
To which could be added:
Psalm 51:16-17 (New International Version)
16. You do not delight in sacrifice, or I would bring it;
you do not take pleasure in burnt offerings.
17. The sacrifices of God are a broken spirit;
a broken and contrite heart,
O God, you will not despise.
Hosea 6:6 (New International Version)
6. For I desire mercy, not sacrifice,
and acknowledgment of God rather than burnt offerings.
What you seem to fail to grasp is that these statements are not absolute, but relative; they do not make void the many commands and regulations (literally hundreds) regarding the blood sacrifices, which were but a type of Jesus' sacrifice for us.
The prophet Samual clearly places sacrifice and obedience in their proper relative relation:
1 Samuel 15:22 (New International Version)
22. But Samuel replied:
"Does the LORD delight in burnt offerings and sacrifices
as much as in obeying the voice of the LORD ?
To obey is better than sacrifice,
and to heed is better than the fat of rams.