“Wherein God, willing more abundantly to shew unto the heirs of promise the immutability of his counsel, confirmed it by an oath:”
Hebrews 6:17 KJV
Being justified by his grace, we are made heirs according to the hope of eternal life, being fully persuaded that, what God has promised, He is able also to perform!
The Lord(God the Father) hath sworn, and will not repent, Thou(Jesus) art a priest for ever after the order of Melchizedek.
Psalms 110:4 KJV
To (Melchisedec) whom also Abraham gave a tenth part of all;(Melchisdec) first being by interpretation King of righteousness, and after that also King of Salem, which is, King of peace;
Hebrews 7:2 KJV
For the law maketh men high priests which have infirmity; but the word of the oath, which was since the law, maketh the Son(Jesus), who is consecrated for evermore.
Hebrews 7:28 KJV
John to the seven churches which are in Asia: Grace be unto you, and peace, from him(God the Father) which is, and which was, and which is to come; and from the seven Spirits which are before his throne;
And from Jesus Christ, who is the faithful witness, and the first begotten of the dead, and the prince of the kings of the earth. Unto him that loved us, and washed us from our sins in his own blood,
And hath made us kings and priests unto God and his Father; to him be glory and dominion for ever and ever. Amen.
Revelation 1:4-6 KJV