Matthew Poole and continuators on Genesis 24:6

6 And Abraham said unto him, Beware thou, that thou bring not my son thither again .

In case she will not come hither, do not thou engage that he shall go thither. Why so? 1. Because there was more danger of infection from his wife and her kindred because of their friendly and familiar and constant converse with him, than from the Canaanites, who were strangers to him, and lived separately from him, and had but little conversation with him. 2. Because the command of God to Abraham to come out of Chaldaea and into Canaan, did extend to his posterity also, whom God would oblige to dwell there as long as they could, that they might live in constant Faith and expectation of the performance of Gods promise in giving this Land unto them. Quest. How could he bring Isaac thither again, where he never was? Answ. 1. Isaac might be said to be there before vertually, or in the Loyns of his Father, as Levi is said to pay Tithes to Melchisedek by Abraham in whose Loyns he was. 2. This again may be referred to the servant, that when he returned again he would not carry Isaac along with them. 3. He might reasonably suppose that Isaac must go once thither to fetch his Wife, (for her coming so suddenly to him was an unexpected thing) but he would not have him promise, that when he had done so once, he should go thither again to live there with her.