Exodus 8:29

And Moses said, Behold... I will in-treat the Lord. — Moses accepted Pharaoh’s second promise, and took no special exception to its condition — “only ye shall not go very far away.” He had distinctly stated his own demand, which was for “a three days’ journey into the wilderness” (Exodus 5:3; Exodus 8:27). It was for Pharaoh to settle with himself whether he considered that distance “very far” or not. As he made no clear objection to the distance, Moses was bound to suppose that he allowed it.

Let not Pharaoh deal deceitfully any more. God’s servants must rebuke even kings when they openly break the moral law (1 Samuel 13:13; 1 Samuel 15:16; 2 Samuel 12:7; 1 Kings 21:20; Matthew 14:4. &c.). Pharaoh had promised unconditionally to let the people go if the frogs were removed (Exodus 8:8), and had. then flagrantly broken his word. Moses was right to rebuke his “deceit.”