'Sure' in the Bible

"Also, be sure to rub every offering from your grain offering with salt. You are not ever to remove the salt of the covenant of your God from your grain offering. Present all your offerings with salt."

"Be sure to keep all my statutes and observe all my ordinances, so that the land where I'm about to bring you to live won't vomit you out.

so that he'll be sure to be accepted, he is to offer a male without defect from the bulls, the lambs, and the goats.