For every high priest is appointed to offer gifts and sacrifices; therefore it was necessary for this [priest] also to have something to offer.
Hebrews 8:3 In-Context
Now the main point of what we are saying is this: We do have such a high priest, who sat down at the right hand of the throne of the Majesty in heaven,
and who serves in the sanctuary, the true tabernacle set up by the Lord, not by a mere human being.
Every high priest is appointed to offer both gifts and sacrifices, and so it was necessary for this one also to have something to offer.
If he were on earth, he would not be a priest, for there are already priests who offer the gifts prescribed by the law.
They serve at a sanctuary that is a copy and shadow of what is in heaven. This is why Moses was warned when he was about to build the tabernacle: “See to it that you make everything according to the pattern shown you on the mountain.”