'Sure' in the Bible

Make sure you are very strong and brave! Carefully obey all the law my servant Moses charged you to keep! Do not swerve from it to the right or to the left, so that you may be successful in all you do.

So Joshua made sure they marched the ark of the Lord around the city one time. Then they went back to the camp and spent the night there.

I will drive out before the Israelites all who live in the hill country from Lebanon to Misrephoth Maim, all the Sidonians; you be sure to parcel it out to Israel as I instructed you."