Genesis 23:13

But if thou wilt give it; it is a short speech, and something must be supplied; either if thou wilt give or resign it to me; or, if thou be the man of whom I speak; for though Abraham knew his name, he might not know him by face, nor that he was then present. He prudently chose rather to buy it than to receive it as a gift, partly because it would be the surer to him and his, Genesis 23:17,20, and partly because he would not have too great obligations to his pagan neighbours.