'Be Careful' in the Bible

So be careful how you listen; for whoever has [a teachable heart], to him more [understanding] will be given; and whoever does not have [a longing for truth], even what he thinks he has will be taken away from him.”

and on the morrow, going forth, taking out two denaries, he gave to the innkeeper, and said to him, Be careful of him, and whatever thou mayest spend more, I, in my coming again, will give back to thee.

Be careful, therefore, that the light that is in you is not darkness.

Then he told them, "Be careful to guard yourselves against every kind of greed, because a person's life doesn't consist of the amount of possessions he has."

Be careful. If your brother sins against you, rebuke him. If he repents, forgive him.

He said, “Be careful and see to it that you are not misled; for many will come in My name [appropriating for themselves the name Messiah which belongs to Me alone], saying, ‘I am He,’ and, ‘The time is near!’ Do not follow them.

"So be careful, or your hearts will be loaded down with carousing, drunkenness, and cares of this life, and that day will come on you suddenly.