'Guard' in the Bible

because Herod feared John, knowing that he was a righteous and holy man, and he continually kept him safe. When he heard John [speak], he was very perplexed; but he enjoyed listening to him.

And immediately the king, having sent one of the guard, ordered his head to be brought. And he went out and beheaded him in the prison,

Jesus repeatedly ordered them, saying, “Watch out! Beware of the leaven of the Pharisees and the leaven of Herod.”

Moreover in the course of His teaching He said, "Be on your guard against the Scribes who like to walk about in long robes and to be bowed to in places of public resort,

“But you, be on your guard! They will hand you over to sanhedrins, and you will be flogged in the synagogues. You will stand before governors and kings because of Me, as a witness to them.

So be on your guard! I've told you everything before it happens."

“Be on guard and stay constantly alert [and pray]; for you do not know when the appointed time will come.

His betrayer had given them a signal. “The One I kiss,” he said, “He’s the One; arrest Him and take Him away under guard.”

The soldiers led Jesus into the courtyard of the palace (that is, the governor's headquarters) and called out the whole guard.