'Guarded' in the Bible

Shallum son of Kore, son of Ebiasaph, son of Korah, and his relatives from his family (the Korahites) were assigned to guard the entrance to the sanctuary. Their ancestors had guarded the entrance to the Lord's dwelling place.

Heman and Jeduthun were in charge of the music, including the trumpets, cymbals, and the other musical instruments used in praising God. The sons of Jeduthun guarded the entrance.