Moses
Genesis 21:24ESV·traditional attribution

And Abraham said, “I will swear.”

John Calvin Reformed @genevareformer

24. And Abraham said, I will swear . Although he had the stronger claim of right, he yet refuses nothing which belonged to the duty of a good and moderate man. And truly, since it is becoming in the sons of God to be freely ready for every duty; nothing is more absurd, than for them to appear reluctant and morose, when what is just is required of them.

Matthew Henry Presbyterian @wholebiblehenry

We have here an account of the treaty between Abimelech and Abraham, in which appears the accomplishment of that promise (Gen 12:2) that God would make his name great. His friendship is valued, is courted, though a stranger, though a tenant at will to the Canaanites and Perizzites. I. The league is proposed by Abimelech, and Phichol his prime-minister of state and general of his army. 1.

Commenting on Genesis 21:22-32

John Gill Reformed Baptist @doctorgill

And Abimelech said, I wot not who hath done this thing,.... He pleads ignorance; he knew nothing of it before, nor now which of his servants had done it; intimating, that if he could know who it was, he should severely reprimand him for it: neither didst thou tell me: signifying that he was to blame he did not complain of it sooner; and at...