'Be Careful' in the Bible
and saying, "Be careful not to tell any one, but go and show yourself to the Priest, and for your purification present the offerings that Moses appointed as evidence for them."
And He said to them, Be careful what you are hearing. The measure [of thought and study] you give [to the truth you hear] will be the measure [of virtue and knowledge] that comes back to you -- "and more [besides] will be given to you who hear.
And Jesus began to tell them, Be careful and watchful that no one misleads you [about it].
Be careful! I have told you everything ahead of time.