Charles Ellicott Commentary 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 turned trembling one to another, saying, What is this that God hath done unto us?" — Genesis 42:28 (ASV)

Their heart failed them. — This verse is far more poetic in the Hebrew, where, literally it is And their heart went forth, and they trembled each to his brother. Their courage left them, and they stood looking at one another in terror.