'Careful' in the Bible

He said to them, “Men of Israel, be careful about what you’re going to do to these men.

They paid careful attention to him because he had thrilled them for a long time with his occult performances.

So be careful that what the prophets said doesn't happen to you:

Take these men, purify yourself along with them, and pay for them to get their heads shaved. Then everyone will know that what they were told about you amounts to nothing, but that you yourself are also careful about observing the law.

“The Jews,” he said, “have agreed to ask you to bring Paul down to the Sanhedrin tomorrow, as though they are going to hold a somewhat more careful inquiry about him.

saying, “Men, I sense [after careful thought and observation] that this voyage will certainly be a disaster and with great loss, not only of the cargo and the ship, but also of our lives.”