'Oath' in the Bible

And all Israel have been sinners against your law, turning away so as not to give ear to your voice: and the curse has been let loose on us, and the oath recorded in the law of Moses, the servant of God, for we have done evil against him.

Then in my hearing the man clothed in linen, who was over the river, lifting up his right hand and his left hand to heaven, took an oath by him who is living for ever that it would be a time, times, and a half; and when the power of the crusher of the holy people comes to an end, all these things will be ended.