'Set Apart' in the Bible

At that time the LORD set apart the tribe of Levi to carry the Ark of the Covenant of the LORD, to stand in the LORD's presence, to serve, and to bless his name until this day.

"Set apart for the LORD your God every firstborn male among your herd and flock. You must not put the firstborn of your ox to work or shear the firstborn of your flock.

from the choicest of the earth and its fullness, and the favor of the one who lived in the burning bush. May blessing rest on Joseph's head, and on the crown of the head of the one set apart from his brothers.