Ezekiel Chapter 43 Vs. 19

 The Altar

And thou shalt give to the priests the Levites that be of the seed of Zadok, which approach unto me, to minister unto me, saith the Lord GOD, a young bullock for a sin offering. Eze 43:19

seed of Zadok... The priests on duty. These priests will be descended from Zadok (cf. Eze. 43:19; 44:15; 48:11), the high priest in Solomon’s day (1Ki. 1:26-27). The tasks of the Levites in Solomon’s temple were more extensive (cf. 1Ch. 15:16; 16:4; 23:28-31). (see 40:46 and 44:10).

a young bullock... Exact offerings, in language just as definitive as the literal descriptions in Moses’ day, are also just as literal here. They are of a memorial nature; they are not efficacious any more than Old Testament sacrifices were.

As Old Testament sacrifices pointed forward to Christ’s death, so these are tangible expressions, not competing with, but pointing back to the value of Christ’s completely effective sacrifice, once for all (Heb. 9:28; 10:10).

God at that time endorsed Old Testament offerings as tokens of forgiving and cleansing worshipers on the basis and credit of the great Lamb they pointed to, who alone could take away sins (John 1:29).

The tangible expressions of worship, which the Israelites for so long failed to offer validly (Isa. 1:11-15), will at last be offered acceptably, then with full understanding about the Lamb of God to whom they point. The bread and the cup, which believers today find meaningful, do not compete with Christ’s cross but are tangible memorials of its glory. So will these sacrifices be.

The individual brought the sacrificial animal to the priest to be sacrificed. Zadok is mentioned because they all remember him and his ancestry. This is saying, leave the ministry in the temple to the family God had chosen out to do it.

A seven-day ritual will be employed by the priests… of Zadok (cf. Eze. 40:46) to set the altar apart to the Lord. This consecration service will be similar in some ways to the services followed by Moses (Exo. 40:10, 40:29) and Solomon (2Ch. 7:8-9) to sanctify their houses of worship to God. After seven days of offering bulls, goats, and rams the priests will present the people’s burnt offerings and fellowship offerings on the altar.