Bible Verses About Oaths: Often accompanied by placing the hand under the thigh of the person sworn to

So Abraham instructed the chief servant of his household, who managed all he owned, “Place your hand under my thigh,

So the servant placed his hand under the thigh of his master Abraham and swore an oath to him concerning this matter.

When the time drew near for Israel to die, he called his son Joseph and said to him, “If I have found favor in your eyes, put your hand under my thigh and promise to show me kindness and faithfulness. Do not bury me in Egypt,