Arise, O LORD; O God, lift up thine hand: forget not the humble.
Arise, O Lord. Here the second part of the psalm begins. The prayer that suggests itself to the believer as the only resource in his perplexity at the success of sinners and the depression of the godly.
Lift up thine hand - to vindicate thy people, and to strike the ungodly (Micah 5:9; Exodus 7:5; Isaiah 5:25). The image is from one who had his hand at rest in his bosom, in the fold of the Oriental robe, and who lifts it out for action.
Forget not - show the wicked it is not as they say, "God hath forgotten" (Psalms 10:11).
The humble - rather, 'the afflicted' (see note, Psalms 9:12).