Genesis 24:3

I will make thee swear This was both for Abraham's own satisfaction, and to engage his servant to all possible care and diligence in this important business. Thus God swears his servants to their work, that, having sworn, they may perform it. By the Lord, (Hebrews Jehovah,) the God of heaven and the God of earth Observe with what reverence Abraham speaks of God, and with what solemnity this oath is administered and taken! And see how careful Abraham is that his son should not marry one of corrupt principles and manners. He was in such high esteem among the Canaanites, that, undoubtedly, he could have married Isaac to a daughter of one of the princes of the land. But he saw that the Canaanites were degenerating into great wickedness, and knew that they were designed for ruin; and he would not marry his son among them, lest they should be a snare to his soul. To obtain for him, as a partner in life, a person of piety and virtue, is his chief, if not his sole concern, and therefore he sends even to a distant country for such a one. Alas! how different is this from the conduct of many! Wealth and dignity are the chief objects they fix their thoughts on in marrying their children. They seek not in their choice those that are sincere and devout worshippers of God, but those who have the largest possessions; not those rich in good works, but those rich in the world. And this, perhaps, is one chief and principal cause of the great corruption of manners among us.