'Guard' in the Bible

When he drove the man out, he placed on the eastern side of the orchard in Eden angelic sentries who used the flame of a whirling sword to guard the way to the tree of life.

Now in Egypt the Midianites sold Joseph to Potiphar, one of Pharaoh's officials, the captain of the guard.

Now Joseph had been brought down to Egypt. An Egyptian named Potiphar, an official of Pharaoh and the captain of the guard, purchased him from the Ishmaelites who had brought him there.

so he imprisoned them in the house of the captain of the guard in the same facility where Joseph was confined.

The captain of the guard appointed Joseph to be their attendant, and he served them. They spent some time in custody.