Send therefore now, and {e} gather thy cattle, and all that thou hast in the field; for upon every man and beast which shall be found in the field, and shall not be brought home, the hail shall come down upon them, and they shall die.

(e) Here we see though God's wrath is kindled yet there is a certain mercy shown even to his enemies.Exodus 9:19 Parallel Commentaries

Sign Seekers, and the Enthusiast Reproved.
(Galilee on the Same Day as the Last Section.) ^A Matt. XII. 38-45; ^C Luke XI. 24-36. ^c 29 And when the multitudes were gathering together unto him, ^a 38 Then certain of the scribes and Pharisees answered him, saying, Teacher, we would see a sign from thee. [Having been severely rebuked by Jesus, it is likely that the scribes and Pharisees asked for a sign that they might appear to the multitude more fair-minded and open to conviction than Jesus had represented them to be. Jesus had just wrought …
J. W. McGarvey—The Four-Fold Gospel

The Hardening in the Sacred Scripture.
"He hath hardened their heart."-- John xii. 40. The Scripture teaches positively that the hardening and "darkening of their foolish heart" is a divine, intentional act. This is plainly evident from God's charge to Moses concerning the king of Egypt: "Thou shalt speak all that I command thee; and I will harden Pharaoh's heart, and multiply My signs and wonders in the land of Egypt. But Pharaoh shall not harken unto you, and I will lay My hand upon Egypt, and the Egyptians shall know that I am the …
Abraham Kuyper—The Work of the Holy Spirit

Exposition of Chap. Iii. (ii. 28-32. )
Ver. 1. "And it shall come to pass, afterwards, I will pour out My Spirit upon all flesh; and your sons and your daughters shall prophesy; your old men shall dream dreams, and your young men shall see visions." The communication of the Spirit of God was the constant prerogative of the Covenant-people. Indeed, the very idea of such a people necessarily requires it. For the Spirit of God is the only inward bond betwixt Him and that which is created; a Covenant-people, therefore, without such an inward …
Ernst Wilhelm Hengstenberg—Christology of the Old Testament

Exodus
The book of Exodus--so named in the Greek version from the march of Israel out of Egypt--opens upon a scene of oppression very different from the prosperity and triumph in which Genesis had closed. Israel is being cruelly crushed by the new dynasty which has arisen in Egypt (i.) and the story of the book is the story of her redemption. Ultimately it is Israel's God that is her redeemer, but He operates largely by human means; and the first step is the preparation of a deliverer, Moses, whose parentage, …
John Edgar McFadyen—Introduction to the Old Testament