Genesis 16:8

Whence camest thou? — It is noteworthy that in these Divine communications God’s knowledge of all the circumstances is not presumed, but the person visited is led on to tell them. This adds very much to the freshness and poetry of the narrative. Here, however, in the address, Hagar, Sarai’s maid, the angel, at least, shows that he is aware who she is, and also reminds her of what she had forgotten, that in bestowing her upon Abram Sarai did not cease to be her mistress.