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? Their heart failed them - ויצא לבם valyetse libbam, their heart went out. This refers to that spasmodic affection which is felt in the breast at any sudden alarm or fright. Among the common people in our own country we find an expression exactly similar, "My heart was ready to leap out at my mouth," used on similar occasions.
What is this that God hath done unto us? - Their guilty consciences, now thoroughly awakened, were in continual alarms; they felt that they deserved God's curse, and every occurrence served to confirm and increase their suspicions.