'Edge' in the Bible

While they were going down to the edge of town, Samuel said to Saul, "Tell the servant to go on ahead of us." So he did. Samuel then said, "You remain here awhile, so I can inform you of God's message."

When Samuel turned to leave, Saul grabbed the edge of his robe and it tore.

David's men said to him, "This is the day about which the Lord said to you, 'I will give your enemy into your hand, and you can do to him whatever seems appropriate to you.'" So David got up and quietly cut off an edge of Saul's robe.

Afterward David's conscience bothered him because he had cut off an edge of Saul's robe.

Look, my father, and see the edge of your robe in my hand! When I cut off the edge of your robe, I didn't kill you. So realize and understand that I am not planning evil or rebellion. Even though I have not sinned against you, you are waiting in ambush to take my life.