Genesis 42:28
And he said unto his brethren, My money is restored; and, lo, it is even in my sack: and their heart failed them, and they were afraid, saying one to another, What is this that God hath done unto us? And he said unto his brethren, My money is restored; and, lo, it is even in my sack: and their heart failed them, and they were afraid, saying one to another, What is this that God hath done unto us?
The verse belongs to the brothers' journey to Egypt for grain during the famine. When brought before Joseph they bowed to him without recognizing him, while he recognized them and remembered his dreams, so their bowing fulfilled the dreams. On the sad journey home from Egypt, one brother opened his sack to feed his animal and found his money or silver paid for grain returned exactly as he had brought it, and told the others.
Their failing hearts meant alarm and perplexity, reading the unexpected restoration as a troubling act of God. They took it as a new evil that would bring further trouble. Their question about what God had done to them meant debating whether to take the money as a token of good from the Lord or as God allowing it to punish them for their sins and plunge them still deeper in affliction.
It revealed a guilty conscience over their cruelty to Joseph, acknowledging that God had seen and marked their wrongs and was now visiting them with punishment for their transgressions.