Charles Ellicott Commentary Genesis 24:65

"And she said unto the servant, What man is this that walketh in the field to meet us? And the servant said, It is my master. And she took her veil, and covered herself." — Genesis 24:65 (ASV)

She took a vail, and covered herself. —Brides are usually taken to the bridegroom enveloped in a veil, which covers the whole body, and is far larger than that ordinarily worn. At the present time the bride-veil is usually red, the ordinary veil blue or white. By wrapping herself in this veil Rebekah notified that she was the bride. After marriage it was seldom worn at this early period, and so both the Egyptians and Abimelech saw Sarah’s beauty.