Consecration

the devoting or setting apart of anything to the worship or
service of God. The race of Abraham and the tribe of Levi were
thus consecrated (Ex. 13:2, 12, 15; Num. 3:12). The Hebrews
devoted their fields and cattle, and sometimes the spoils of
war, to the Lord (Lev. 27:28, 29). According to the Mosaic law
the first-born both of man and beast were consecrated to God.

In the New Testament, Christians are regarded as consecrated
to the Lord (1 Pet. 2:9).