'Be Careful' in the Bible

Therefore be careful how you hear. For whoever has, to him shall be given; and whoever has not, from him shall be taken even that which he seems to have.

According to the grace of God which is given to me, as a wise master builder, I have laid the foundation, and another builds on it. But let every man be careful how he builds on it.

Faithful is the Word, and as to these things, I desire that you strongly affirm that those believing God might be careful to maintain good works. These things are good and profitable to men.