Malachi 2:5 My covenant was with him, a covenant of life and peace, and I gave them to him; this called for reverence and he revered me and stood in awe of my name.
Here He spoke of Levi, specifically Phinehas. The promise He gave in Numbers 25:12-13....tell him I am making my covenant of peace with him. He and his descendants will have a covenant of a lasting priesthood, because he was zealous for the honor of his God and made atonement for the Israelites.
The tribe of Levi was chosen to serve Yahweh at the tabernacle because of Exodus 32:26-29, the same reason -
they were zealous for the honor of Yahweh.
The blessing of Jacob, the one who struggled with Yahweh, to Levi was kind of peculiar in Genesis 49:5-7. One wonders why.
However, the blessing of Moses, the man of Yahweh and His prophet, in Deuteronomy 33:8-11, says: Your Thummim and Urim belong to your faithful servant. You tested him at Massah; you contended with him at the waters of Meribah. He said of his father and mother, ‘I have no regard for them.’ He did not recognize his brothers or acknowledge his own children, but he watched over your word and guarded your covenant. He teaches your precepts to Jacob and your law to Israel. He offers incense before you and whole burnt offerings on your altar. Bless all his skills, Lord, and be pleased with the work of his hands. Strike down those who rise against him, his foes till they rise no more.
The same echoes in the new testament:
Matthew 10:34-38 Do not suppose that I have come to bring peace to the earth. I did not come to bring peace, but a sword. For I have come to turn “ ‘a man against his father, a daughter against her mother, a daughter-in-law against her mother-in-law— a man’s enemies will be the members of his own household Anyone who loves their father or mother more than me is not worthy of me; anyone who loves their son or daughter more than me is not worthy of me. Whoever does not take up their cross and follow me is not worthy of me.
James 1:25 But whoever looks intently into the perfect law that gives freedom, and continues in it—not forgetting what they have heard, but doing it—they will be blessed in what they do.