Moses
Genesis 21:25BSB·traditional attribution

But when Abraham complained to Abimelech about a well that Abimelech’s servants had seized,

John Calvin Reformed @genevareformer

25. And Abraham reproved Abimelech . This complaint seems to be unjust; for, if he had been injured, why did he not resort to the ordinary remedy? He knew the king to be humane, to have some seed of piety, and to have treated himself courteously and honorably; why then does he doubt that he will prove the equitable defender of his right?

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 Abraham took sheep and oxen, and gave them unto Abimelech,.... In gratitude for former favours he had received from him, in token of the friendship that subsisted between them, and for the confirmation of it; and to show that he was fully satisfied with Abimelech's answer to his complaint, as well as willing to enter into covenant by sacrifice, when such creatures were divided...