'Swore' in the Bible

Now from the time we left Kadesh-barnea until we crossed the Wadi Zered was 38 years. All of that generation, the soldiers in the camp, were destroyed just as the LORD swore they would be.

"But the LORD was angry with me because of you. So he swore that I'll never cross the Jordan River to enter the good land that the LORD your God is about to give you as an inheritance.

so that he will elevate you to be a people for him. And he will be God to you, just as he promised you and swore to your ancestors Abraham, Isaac, and Jacob.