'Edge' in the Bible

and He saw two boats lying at the edge of the lake; but the fishermen had gotten out of them and were washing their nets.

and they will fall by the edge of the sword, and will be led captive into all the nations; and Jerusalem will be trampled under foot by the Gentiles until the times of the Gentiles are fulfilled.

quenched the power of fire, escaped the edge of the sword, from weakness were made strong, became mighty in war, put foreign armies to flight.