Behold, bless ye the Lord, giving all praise and honor to Him, all ye servants of the Lord, which by night stand in the house of the Lord, the reference being either to the Temple chorus at the vesper service or to those officials of the tribe of Levi, both Levites and priests, who had charge of the Temple during the night, being responsible for the safety of all Temple property and making everything ready for the worship of the next day.
Related Commentaries of Psalms 134:1
Psalms 134:1
1 Behold, bless ye the LORD, all ye servants of the LORD, which by night stand in the house of the LORD.