David opens with an urgent cry: be pleased, O God, to deliver me; make haste, O Lord, to help me. There is no preamble or earlier praise, only the most immediate need.
In verses 2 and 3 he asks that those who seek his life be put to shame and confusion, that those who desire his hurt be turned back in dishonor, and that those who say, Aha, Aha, that is, those who mock him, turn back because of their shame.
Verse 4 shifts the focus: let all who seek God rejoice and be glad in him, and let those who love his salvation say continually that God is great. David asks that his case serve so that others rejoice in God.
Finally, in verse 5, David acknowledges that he is poor and needy and asks God to come quickly. He says: you are my help and my deliverer, O Lord, do not delay.