Commentary for Job 1:10

Haven’t You made a hedge around him Because he knows that You visit him frequently to perform miracles for him, and he is fruitful and multiplies; therefore he performs all these righteous deeds—but You have not tested him.

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made a hedge around him You protected him like a wall, as in (Isa. 5:5) “I will remove its hedge (משוכתו),” its wall. Every expression of בעד stated in the Hebrew language is only an expression of “opposite and before him,” as in (Lev.16:6), “and he shall effect atonement for himself (וכפר בעדו),” he shall wipe away the sin from opposite you and before you (sic), so that the atonement shall be a shield about you. Similarly (Ps. 3:4), “[But You,] O Lord, are a shield about me (בעדי) .”

spread out in the land Heb. פרץ, gained strength, as in (Exod. 1:12), “So would they gain strength (יפרץ), which the Targum renders: And so would they become strong. This is its simple meaning, but our Sages of blessed memory stated in the Aggadah (Baba Bathra 15b, 16a) that they broke the fence of the world, for the goats would slay the wolves.

Satan suggests putting Job to a test to determine just what his true motives are.