Genesis 16:6

“But Abram said unto Sarai, etc.] In a meek, mild and gentle manner: behold, thy maid [is] in thine hand; though Hagar was Abram’s secondary wife he still considers her as Sarai’s maid, and as subject to her, and allows her to exercise authority over her; for he still retained the same love and affection for Sarai, his first and lawful wife, and showed the same respect he ever did, and supported her in her honour and dignity: do to her as it pleaseth thee: not giving her liberty to take away her life, nor even to use her cruelly, but to deal with her as a mistress might lawfully do with a servant, or however exercise that power which a first wife had over a second: perhaps Abram, in…”

“- 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…”