Spread abroad his hands - Probably with the rod of God in them. See what has been said on the spreading out of the hands in prayer, Exodus 9:29. See Clarke on Exodus 9:29 (note).

And Moses went out of the city from Pharaoh,.... Into the field, where, being retired from company, he could freely, and without being disturbed, pray unto God:

and spread abroad his hands unto the Lord; denoting the spreading of cases before God, and expectation, hope, and readiness to receive favours from him:

and the thunder and hail ceased; immediately upon the entreaty of Moses; see the power and prevalence of prayer: a like instance we have in Elijah, James 5:17 and the rain was not poured upon the earth; so that there was rain as well as hail, which was restrained and entirely ceased.

But even this plague did not lead Pharaoh to alter his mind. As soon as it had ceased on the intercession of Moses, he and his servants continued sinning and hardening their hearts.

And Moses went out of the city from Pharaoh, and spread abroad his hands unto the LORD: and the thunders and hail ceased, and the rain was not poured upon the earth.

9:33 Moses went out of the city - Not only for privacy in his communion with God, but to shew that he durst venture abroad into the field, notwithstanding the hail and lightning, knowing that every hail - stone had its direction from God. Peace with God makes men thunder - proof, for it is the voice of their father. And spread abroad his hands unto the Lord - An outward expression of earnest desire, and humble expectation. He prevailed with God; but he could not prevail with Pharaoh; he sinned yet more, and hardened his heart - The prayer of Moses opened and shut heaven, like Elijah's. And such is the power of God's two witnesses, Rev 11:6. Yet neither Moses nor Elijah, nor those two witnesses, could subdue the hard hearts of men. Pharaoh was frighted into compliance by the judgment, but, when it was over, his convictions vanished.

9:22-35 Woful havoc this hail made: it killed both men and cattle; the corn above ground was destroyed, and that only preserved which as yet was not come up. The land of Goshen was preserved. God causes rain or hail on one city and not on another, either in mercy or in judgment. Pharaoh humbled himself to Moses. No man could have spoken better: he owns himself wrong; he owns that the Lord is righteous; and God must be justified when he speaks, though he speaks in thunder and lightning. Yet his heart was hardened all this while. Moses pleads with God: though he had reason to think Pharaoh would repent of his repentance, and he told him so, yet he promises to be his friend. Moses went out of the city, notwithstanding the hail and lightning which kept Pharaoh and his servants within doors. Peace with God makes men thunder-proof. Pharaoh was frightened by the tremendous judgment; but when that was over, his fair promises were forgotten. Those that are not bettered by judgments and mercies, commonly become worse.