Genesis 24:2

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

“And my master made me swear, saying, ‘You shall not take a wife for my son from the daughters of the Canaanites, in whose land I live;

So Joseph found favor in his sight and attended on him; and he appointed him overseer over his house, and all that he owned he gave in his hand.

Then the days for Israel to die drew near, and he called his son Joseph and said to him, “Please, if I have found favor in your sight, place now your hand under my thigh and deal with me in lovingkindness and truth. Please do not bury me in Egypt.

And the elders of his household stood beside him in order to raise him up from the ground, but he was unwilling and would not eat food with them.

And his servant Zimri, commander of half his chariots, conspired against him. Now he was at Tirzah drinking himself drunk in the house of Arza, who was over the household at Tirzah.