'Certain' in the Bible

Be certain to keep all the statutes and ordinances that I am presenting to you today.

You must be certain to tithe all the produce of your seed that comes from the field year after year.

his body must not remain all night on the tree; instead you must make certain you bury him that same day, for the one who is left exposed on a tree is cursed by God. You must not defile your land which the Lord your God is giving you as an inheritance.