'Occasion' in the Bible

and it shall be, that in the morning, as soon as the sun is up, thou shalt rise early, and rush upon the city; and, behold, when he and the people that are with him come out against thee, then mayest thou do to them as thou shalt find occasion.

But his father and his mother knew not that it was of Jehovah; for he sought an occasion against the Philistines. Now at that time the Philistines had rule over Israel.