Hebrews 7:4, 8, 13, 15, 18

Now observe how great this man was to whom Abraham, the patriarch, gave a tenth of the choicest spoils.

In this case mortal men receive tithes, but in that case one receives them, of whom it is witnessed that he lives on.

For the one concerning whom these things are spoken belongs to another tribe, from which no one has officiated at the altar.

And this is clearer still, if another priest arises according to the likeness of Melchizedek

For, on the one hand, there is a setting aside of a former commandment because of its weakness and uselessness