Why would Joseph return the money? Was it a mistake, a test, or something more profound?
The brothers are shocked to find their money returned in their sacks. For them, this is a terrifying sign. They immediately interpret it as a direct act of God against them, saying, "What is this that God hath done unto us?" They see it not as a simple error, but as a divine message, likely connected to their past sin against Joseph. This shows a dawning awareness that their troubles aren't random but orchestrated by a higher power.
Joseph, the one orchestrating this, is using this 'mistake' to test them and to move them towards repentance. He's not just a ruler; he's an instrument of God's plan to bring his brothers to acknowledge their sin and to prepare them for reconciliation.