'Chance' in the Bible

When three companies blew the trumpets and broke the pitchers, they held the torches in their left hands, and the trumpets in their right hands to blow, and they shouted, “A sword for the Lord and for Gideon!”

And in the morning, when the sun is up, get up early and make a rush on the town; and when he and his people come out against you, do to them whatever you have a chance to do.

And taking up the mouth-bone of an ass newly dead, which he saw by chance on the earth, he put to death a thousand men with it.