Moses
Genesis 16:6ESV·traditional attribution

But Abram said to Sarai, “Behold, your servant is in your power; do to her as you please.” Then Sarai dealt harshly with her, and she fled from her.

John Calvin Reformed @genevareformer

6. Behold , thy maid is in thy hand . The greatness of Abram’s humanity and modesty appears from his answer. He does not quarrel with his wife; and though he has the best cause, yet he does not pertinaciously defend it, but voluntarily dismisses the wife who had been given him.

Matthew Henry Presbyterian @wholebiblehenry

We have here the immediate bad consequences of Abram's unhappy marriage to Hagar. A great deal of mischief it made quickly. When we do not well both sin and trouble lie at the door; and we may thank ourselves for the guilt and grief that follow us when we go out of the way of our duty. See it in this story. I.

Commenting on Genesis 16:4-6

John Gill Reformed Baptist @doctorgill

But Abram said unto Sarai,.... 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...