The reading is from St. Paul's Letter to the Hebrews 8:1-6

Brethren, we have such a high priest, one who is seated at the right hand of the throne of the Majesty in heaven, a minister in the sanctuary and the true tent which is set up not by man but by the Lord. For every high priest is appointed to offer gifts and sacrifices; hence it is necessary for this priest also to have something to offer. Now if he were on earth, he would not be a priest at all, since there are priests who offer gifts according to the law. They serve a copy and shadow of the heavenly sanctuary; for when Moses was about to erect the tent, he was instructed by God, saying, "See that you make everything according to the pattern which was shown you on the mountain." But as it is, he has obtained a ministry which is as much more excellent than the old as the covenant he mediates is better, since it is enacted on better promises.