In the one case, the tenth is collected by those who die; but in the other case, by him who is declared to be living.
NIV
Furthermore, here [in the Levitical priesthood] tithes are received by men who are subject to death; while there [in the case of Melchizedek], they are received by one of whom it is testified that he lives [perpetually].
AMP
And here men that die receive tithes; but there he receiveth them, of whom it is witnessed that he liveth.
KJV
"But he became a priest with an oath when God said to him: "The Lord has sworn and will not change his mind: "You are a priest forever."
NIV
For those who formerly became priests received their office without its being confirmed by the taking of an oath by God, but this One was designated and addressed and saluted with an oath, The Lord has sworn and will not regret it or change His mind, You are a Priest forever according to the order of Melchizedek. [Ps. 110:4.]AMP
(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:)
KJV
Where our forerunner, Jesus, has entered on our behalf. He has become a high priest forever, in the order of Melchizedek.
NIV
Where Jesus has entered in for us [in advance], a Forerunner having become a High Priest forever after the order (with the rank) of Melchizedek. [Ps. 110:4.]AMP
Whither the forerunner is for us entered, even Jesus, made an high priest for ever after the order of Melchisedec.
KJV