Genesis 24:7

4 But you shall go to my country, and to my relatives, and take a wife for my son Isaac."

5 The servant said to him, "What if the woman isn`t willing to follow me to this land? Must I bring your son again to the land you came from?"

6 Abraham said to him, "Beware that you don`t bring my son there again.

7 Yahweh, the God of heaven, who took me from my father`s house, and from the land of my birth, who spoke to me, and who swore to me, saying, `To your descendants I will give this land.` He will send his angel before you, and you shall take a wife for my son from there.

8 If the woman isn`t willing to follow you, then you shall be clear from this my oath. Only you shall not bring my son there again."

9 The servant put his hand under the thigh of Abraham his master, and swore to him concerning this matter.

10 The servant took ten camels, of his master`s camels, and departed, having all goodly things of his master`s in his hand. He arose, and went to Mesopotamia, to the city of Nahor.