'Oath' in the Bible

So in my anger I swore a solemn oath that they would never enter my rest."

We who have believed are entering that rest, just as he has said, "So in my anger I swore a solemn oath that they would never enter my rest,"

For when God made his promise to Abraham, he swore an oath by himself, since he had no one greater to swear by.

For people swear by someone greater than themselves, and an oath given as confirmation puts an end to all argument.

In the same way, when God wanted to make the unchangeable character of his purpose perfectly clear to the heirs of his promise, he guaranteed it with an oath,

Now none of this happened without an oath. Others became priests without any oath,

but Jesus became a priest with an oath when God told him, "The Lord has taken an oath and will not change his mind. You are a priest forever."

For the Law appoints as high priests men who are weak, but the promised oath, which came after the Law, results in a Son who is eternally perfect.