'Keep' in the Bible

For it is written, He shall give his angels charge over thee, to keep thee:

But that on the good ground are they, which in an honest and good heart, having heard the word, keep it, and bring forth fruit with patience.

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

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