And he (i.e. the one who had opened his sack) said unto his brethren, My money is restored; and, lo, it is even in my sack (amtachath): and their heart failed them (literally, went forth; as it were, leapt into their mouths through sudden apprehension), and they were afraid, saying one to another (literally, they trembled each one to his brother, a constructio pregnans for they turned trembling towards one another, saying), What is this that God hath done unto us?
Elohim is used, and not Jehovah, because the speakers simply desire to characterize the circumstance as supernatural.