And he said, Hagar, Sarai's maid, whence camest thou? and whither wilt thou go? And she said, I flee from the face of my mistress Sarai. Hagar, Sarai's maid - This mode of address is used to show her that she was known, and to remind her that she was the property of another.
Related Commentaries of Genesis 16:8
Genesis 16:8
8 And he said, Hagar, Sarai's maid, whence camest thou? and whither wilt thou go? And she said, I flee from the face of my mistress Sarai.