Genesis 24:65

“For she [had] said unto the servant, etc.] As soon as she saw a man walking towards them, who she thought with herself might be Isaac: what man is this that walketh in the field to meet us? for by the course he steered, she perceived that he was coming towards them, and so concluded it must be one of the family, and probably the person she was to be married to; for otherwise, had he not by his look and motion discovered that he knew the servant, and was coming towards them, she would have took no notice of him and the servant [had] said, it is my master: meaning not Abraham, but his son, who also was his master: therefore she took a veil, and covered herself; both out of modesty, and as a…”

“she took a veil, and covered herself--The veil is an essential part of female dress. In country places it is often thrown aside, but on the appearance of a stranger, it is drawn over the face, as to conceal all but the eyes. In a bride it was a token of her reverence and subjection to her husband.”