'Priests' in the Bible

(For those priests were made without an oath; but this with an oath by him that said unto him, The Lord sware and will not repent, Thou art a priest for ever after the order of Melchisedec:)

And they truly were many priests, because they were not suffered to continue by reason of death:

Who needeth not daily, as those high priests, to offer up sacrifice, first for his own sins, and then for the people's: for this he did once, when he offered up himself.

For the law maketh men high priests which have infirmity; but the word of the oath, which was since the law, maketh the Son, who is consecrated for evermore.

For if he were on earth, he should not be a priest, seeing that there are priests that offer gifts according to the law:

Now when these things were thus ordained, the priests went always into the first tabernacle, accomplishing the service of God.