'Guard' in the Bible

Meanwhile, about this time Haggith's son Adonijah began to seek a reputation for himself and decided, "I'm going to be king!" So he prepared chariots, cavalry, and 50 soldiers to serve as a security detail to guard him.

Therefore, Lord God of Israel,keep what You promisedto Your servant, my father David:You will never fail to have a manto sit before Me on the throne of Israel,if only your sons guard their walk before Meas you have walked before Me.

Meanwhile, the LORD had spoken to Ahijah, "Be on your guard! Jeroboam's wife is coming to ask you about her son, because he is ill. You're to say such and such to her. When she arrives, she will pretend to be someone else!"

And king Rehoboam made in their stead brasen shields, and committed them unto the hands of the chief of the guard, which kept the door of the king's house.

And it was so, when the king went into the house of the LORD, that the guard bare them, and brought them back into the guard chamber.

As the king was passing by, he cried out to the king and said, “Your servant marched out into the middle of the battle. Suddenly, a man turned aside and brought someone to me and said, ‘Guard this man! If he is ever missing, it will be your life in place of his life, or you will weigh out 75 pounds of silver.’