'Behalf' in the Bible

For every high priest selected from among men is appointed to officiate on their behalf in matters relating to God, that is, to offer gifts and sacrifices for sins.

where Jesus, our forerunner, has gone on our behalf, having become a high priest forever according to the order of Melchizedek.

For the Messiah did not go into a sanctuary made by human hands that is merely a copy of the true one, but into heaven itself, to appear now in God's presence on our behalf.