Hebrews 6:16

For people swear by what is greater [than themselves], and the oath for confirmation [is the] end of all dispute for them.

Exodus 22:11

the oath of Yahweh will be between the two of them [concerning] whether or not he has reached out his hand to his neighbor's possession, and its owner will accept [this], and he will not make restitution.

Genesis 14:22

And Abram said to the king of Sodom, "I have raised my hand to Yahweh, God Most High, Maker of heaven and earth,

Genesis 21:23

So now, swear to me here by God [that] you will not deal with me falsely, or with my descendants, or my posterity. According to the kindness that I have done to you, you shall [pledge] to do with me and with the land where you have dwelled as an alien."

Genesis 21:30-31

And he said, "You shall take the seven ewe-lambs from my hand {as proof on my behalf} that I dug this well."

Genesis 31:53

May the God of Abraham and the God of Nahor, the God of their father judge between us." Then Jacob swore by the Fear of his father Isaac.

Joshua 9:15-20

And Joshua made peace with them, and {he made a covenant with them} to allow them to live happily, and the leaders of the congregation swore [an oath] to them.

2 Samuel 21:2

So the king called the Gibeonites and spoke to them. Now the Gibeonites [were] not from the {Israelites}; they [were] from the remainder of the Amorites. Now the {Israelites} had sworn to them, but Saul tried to wipe them out in his zeal for the {Israelites} and Judah.

Ezekiel 17:16-20

{As I live},' {declares} the Lord Yahweh, '{surely} in the place of the king {who made} him king, who despised his oath and who broke his covenant with him--in the midst of Babylon he will die.

Matthew 23:20-22

Therefore the one who swears by the altar swears by it and by everything [that is] on it.

Hebrews 6:13

For [when] God made a promise to Abraham, since he had no one greater to swear by, he swore by himself,

Treasury of Scripture Knowledge

Summary

For men verily swear by the greater: and an oath for confirmation is to them an end of all strife.

Bible References

An oath

Genesis 21:30
And he said, "You shall take the seven ewe-lambs from my hand {as proof on my behalf} that I dug this well."
Genesis 31:53
May the God of Abraham and the God of Nahor, the God of their father judge between us." Then Jacob swore by the Fear of his father Isaac.
Exodus 22:11
the oath of Yahweh will be between the two of them [concerning] whether or not he has reached out his hand to his neighbor's possession, and its owner will accept [this], and he will not make restitution.
Joshua 9:15
And Joshua made peace with them, and {he made a covenant with them} to allow them to live happily, and the leaders of the congregation swore [an oath] to them.
2 Samuel 21:2
So the king called the Gibeonites and spoke to them. Now the Gibeonites [were] not from the {Israelites}; they [were] from the remainder of the Amorites. Now the {Israelites} had sworn to them, but Saul tried to wipe them out in his zeal for the {Israelites} and Judah.
Ezekiel 17:16
{As I live},' {declares} the Lord Yahweh, '{surely} in the place of the king {who made} him king, who despised his oath and who broke his covenant with him--in the midst of Babylon he will die.

General references

Genesis 21:24
And Abraham said, "I swear."
Isaiah 54:9
"For this [is like] the waters of Noah to me, when I swore {that the waters of Noah would never again pass} over the earth, so I swore {that I would not be} angry at you and rebuke you.
Micah 7:20
You will show faithfulness to Jacob, and loyal love to Abraham, as you have sworn to our ancestors from the days of old.
Luke 1:73
the oath that he swore to Abraham our father, to grant us