Psalm 134:1 calls the servants of the Lord to bless Him, which is echoed in Psalm 135:1-2 where the servants are again called to praise the Lord in His house.
Psalm 134:2 encourages lifting up hands in the sanctuary, a gesture of prayer and worship, which is paralleled in 1 Timothy 2:8 where Paul desires men to pray everywhere, lifting holy hands.
Psalm 134:3 speaks of the Lord blessing from Zion, which resonates with the priestly blessing in Numbers 6:24-26, where the Lord's blessing and peace are invoked upon His people.