'Be Careful' in the Bible

Come on, let's be careful how we treat them, so that when they grow numerous, if a war breaks out they won't join our enemies, fight against us, and leave our land."

"Be careful about everything I've told you, and don't mention the name of other gods. Don't let them be heard in your mouth!"

Be careful! Be sure to obey him. Don't rebel against him, because he won't forgive your transgression, since my Name is in him.