A Song of Ascents. This is the last of 15 “Songs of Ascents” (Ps 120-134). They were sung by pilgrims on their way up to the temple at Jerusalem three times a year for the major feasts.
A call to evening worship.
v.1-2 Servants of the Lord standing in the temple at night (1 Chr 9:23-27) are called to praise (bless) the Lord, lifting up their hands to the holy place (1 Tim 2:8).
v.3 Pronouncement of a blessing from God (who made heaven and earth) in Zion on the people (Ps 115:15).
The true Mount Zion is Jesus, as mediator of the new covenant (Heb 12:22-24). “For there the Lord has commanded the blessing, life forevermore.” (Ps 133:3b, see also Jn 3:16)