Psalms 134 COMMENTARY (Pulpit)

Psalm 134
Pulpit Commentary
Verse 1. - Behold. The word calls attention to an immediate need - something that is to be done, and to be done at once. Bless ye the Lord. This must mean "for us" - "on our behalf." Thank God for having brought our journey to a prosperous end. All ye servants of the Lord, which by night stand in the house of the Lord; i.e. ye special servants of the Lord, priests and Levites, now standing within his courts, and engaged in his worship. The temple was never left without a body of priests and Levites, to keep it and sing praises in it.
Lift up your hands in the sanctuary, and bless the LORD.
Verse 2. - Lift up your hands. The attitude of prayer and praise (Psalm 63:4; Psalm 119:48; Psalm 141:2). In the sanctuary; rather, towards the sanctuary; i.e. towards the holy of holies. Others render, "in holiness." And bless the Lord (compare the first clause of ver. 1).
The LORD that made heaven and earth bless thee out of Zion.
Verse 3. - The Lord that made heaven and earth (comp. Genesis 1:1; Psalm 115:15; Psalm 121:2; Psalm 124:8; Psalm 146:6). Bless thee out of Zion. God was regarded as dwelling in Zion, and therefore as giving his blessings out of Zion (comp. Psalm 20:2; Psalm 53:6; Psalm 128:5).

Courtesy of Open Bible