But I will establish My covenant (solemn promise, formal agreement) with you; and you shall come into the ark—you and your [three] sons and your wife, and your sons’ wives with you.

On the same day the Lord made a covenant (promise, pledge) with Abram, saying,

“To your descendants I have given this land,
From the river of Egypt to the great river Euphrates—

And you shall be circumcised in the flesh of your foreskins, and it shall be the sign (symbol, memorial) of the covenant between Me and you.

But My covenant [My promise, My solemn pledge], I will establish with Isaac, whom Sarah will bear to you at this time next year.”

so that I may make you solemnly promise by the Lord, the God of heaven and the God of the earth: You must not acquire a wife for my son from the daughters of the Canaanites, among whom I am living.

So the servant placed his hand under the thigh of his master Abraham and gave his solemn promise he would carry out his wishes.

but to the sons of his concubines [Hagar and Keturah], Abraham gave gifts while he was still living and he sent them to the east country, away from Isaac his son [of promise].

Stay in this land. Then I will be with you and will bless you, for I will give all these lands to you and to your descendants, and I will fulfill the solemn promise I made to your father Abraham.

When the time drew near for him 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 me that you will deal with me in kindness and faithfulness. Do not bury me in Egypt.

"Promise me," Israel insisted. So Joseph promised. Then Israel collapsed on his bed.

So Joseph made all of Israel's other children make this promise: "Because God is certainly going to take care of you, you are to carry my bones up from here."