'Be Careful' in the Bible
"Be careful not to practice your righteousness in front of people, to be seen by them. Otherwise, you will have no reward from your Father in heaven.
For this cause I say unto you, Do not be careful about your life, what ye should eat and what ye should drink; nor for your body what ye should put on. Is not the life more than food, and the body than raiment?
Be not careful therefore for the morrow, for the morrow shall be careful about itself. Sufficient to the day is its own evil.
and Jesus said to him, "Be careful to tell no one, but go and show yourself to the priest, and offer the gift which Moses appointed as evidence for them."
Then their eyes were opened. And assuming a stern tone Jesus said to them, "Be careful to let no one know."
Jesus said to them, Be careful and on your guard against the leaven (ferment) of the Pharisees and Sadducees.
"Be careful not to look with scorn on a single one of these little children, for I tell you that in heaven their angels have uninterrupted access to my Father in heaven.