'Keep' in the Bible

But he said, Yea rather, blessed are they that hear the word of God, and keep it.

And he said unto them, Take heed, and keep yourselves from all covetousness: for a man's life consisteth not in the abundance of the things which he possesseth.

For the days shall come upon thee, when thine enemies shall cast up a bank about thee, and compass thee round, and keep thee in on every side,