Charles Spurgeon Commentary Genesis 24:3

"And I will make thee swear by Jehovah, the God of heaven and the God of the earth, that thou wilt not take a wife for my son of the daughters of the Canaanites, among whom I dwell." — Genesis 24:3 (ASV)

This holy man was careful of the purity of his family; he knew what an ill-effect a Canaanitish wife might have upon his son, and also upon his offspring. He was, therefore, particularly careful here.

I wish that all parents were the same.