Genesis 16:8

“And he said, Hagar, Sarai’s maid, etc.] He calls her by her name, which might surprise her, and describes her by her character and condition, in order to check her pride, and put her in mind of her duty to her mistress; and to suggest to her, that she ought to have been not where she was, but in the house of her mistress, and doing her service: whence camest thou? this question the angel asked, not as ignorant, for he that could call her by her name, and describe her character and state, knew from whence she came; but he said this not only to lead on to what he had further to say to her, but to put her upon considering from whence she came, what she had left behind, and what blessings she…”

“- The Birth of Ishmael 1. הנר hāgār, Hagar, “flight.” Hejrah, the flight of Muhammed. 7. מלאך mal'ak “messenger, angel.” A deputy commissioned to discharge a certain duty for the principal whom he represents. As the most usual task is that of bearing messages, commands, or tidings, he is commonly called a “messenger” ἄγγελος angelos). The word is therefore a term of office, and does not further distinguish the office-bearer than as an intelligent being. Hence, a מלאך mal'ak may be a man deputed by a man Genesis 32:3; Job 1:14, or by God Haggai 1:13; Malachi 3:1, or a superhuman being delegated in this case only by God. The English term “angel” is now especially appropriated to the latter…”

“16:8-12 The angel’s rhetorical questions encouraged Hagar to pour out her heart to God. When she did, God commanded her to return and submit (16:9), promising that her son would have innumerable descendants. The angel of the Lord never referred to Hagar as Abram’s wife, only as Sarai’s servant. She would have Abram’s child, but Ishmael was not central to God’s covenant with Abram.”