6 Bible Verses about Oaths, Divine

For when God made a promise to Abraham, since He could not make a vow by anyone greater, He vowed by Himself, saying [Gen. 22:16-17], "I will certainly bless you and will multiply [your descendants]."

For people make vows by someone greater [than themselves], and an argument is settled when someone takes an oath [that he is telling the truth]. Since God wanted to show conclusively to those who would inherit the promise [i.e., Abraham and all of his spiritual descendants], how unchangeable His purpose was, He confirmed it with an oath. He did this so that by two unchangeable things [i.e., His promise and His oath], (and it is impossible for God to lie), we, who have fled [to God] for refuge, could be greatly encouraged to take hold of the hope set before us [i.e., the hope of never ending life].

in order to show mercy to our forefathers and to remember His holy Agreement. [This Agreement was] the oath by which He swore to Abraham, our forefather,

Since he was a prophet and knew that God had pledged His word that one of his [i.e., David's] descendants would sit on his throne [as king];

For it is declared [about Jesus in the Scriptures, Psa. 110:4], "You are a priest forever according to the order of Melchizedek." For on one hand, the previous command [i.e., the law of Moses] was set aside because it was weak and useless, (since the law did not make anything [i.e., anyone] perfect), but on the other hand, there is the introduction of a better hope [which did bring perfection through Christ], by which we draw near to God.read more.
And this was not done without the taking of an oath [by God], (for [Levitical] priests were appointed without [God] taking [such] an oath, but Christ was appointed with an oath by God when He said to Him [Psa. 110:4], "The Lord made a vow and will not change His mind [when He said], 'You are a priest forever')." So therefore, Jesus has become the guarantee of a better Agreement [between God and mankind]. And on one hand, many people were appointed to be [Levitical] priests because they were prevented by death from continuing [to serve]. [Note: The idea is that Levitical priests had to be constantly replaced]. But on the other hand, Jesus has a permanent priesthood because He lives forever. So, He is also able to save completely those people who approach God through Him, since He lives forever to intercede [i.e., to plead to God] on their behalf. For Jesus was a very suitable head priest for us [i.e., He meets our needs very well], because He was holy, innocent, without [moral] corruption, separated from sinners and [exalted] above the heavens. He does not need to offer up [animal] sacrifices every day like those head priests did [Note: The head priest here is represented as being in charge of the daily sacrifices offered by the other priests], first for His own sins and then for the people's sins. For He did this once for all time when He offered up Himself [on the cross]. For the law of Moses appoints [morally] weak men to be head priests, but the message of [God's] oath, which came after that law [Note: The quotation from Psa. 110:4 (See verse 21) was written after the law of Moses was given] appointed the Son, who was made perfect [in every way] forever.

Therefore, I was angry with that generation of people and said, 'They always go astray in their hearts, and they did not understand my ways.' So I vowed in my anger, 'They will not enter a state of rest with me.'"