Praise the Lord, all you servants of the Lord

Psalm 134:1-3
Praise the Lord, all you servants of the Lord who minister by night in the house of the Lord. Lift up your hands in the sanctuary and praise the Lord, May the Lord,  the Maker of heaven and earth bless you from Zion.
An every prayer
Group of psalms closes with this little night-time prayer as the pilgrims(朝聖者) depart. V1,2 would seem to be their words to the priests and Levites, who respond with the blessing in V 3.
Why?
All of the servant of the Lord is Pilgrims come to the Lord and praise God.
God's bless is full of our life and environment for God loves us.
How?
Praise the Lord any time and any situation, no matter good or worse condition, praise the Lord, the Maker of the heaven and earth.