Hebrews 5:1
For every head priest is chosen from among men, and is appointed on behalf of people, to offer both gifts and sacrifices for sins.
Hebrews 7:27
He does not need to offer up [animal] sacrifices every day like those head priests did [Note: The head priest here is represented as being in charge of the daily sacrifices offered by the other priests], first for His own sins and then for the people's sins. For He did this once for all time when He offered up Himself [on the cross].
Hebrews 8:3-4
For every head priest [on earth] is appointed to offer both gifts and sacrifices, so it is necessary that this Head Priest [i.e., Jesus] also have something to offer.