Let them know that it is your hand, the Lord have done it.

Psalm 109:21-31
David prayed to the Lord confessed he is poor and needy and his heart is wounded within him.
O sovereign Lord, deal well with me for your name's sake; out of the goodness of your love, deliver me.
Help me, saved me in accordance with your love. Let them know that it is your hand, that you, O lord, have done it.
They may curse, but you will bless.
With my mouth I will greatly extol the Lord; in the great throng I will praise him For he stands at the right hand of the needy one, to save his life from those who condemn him.
Why?
Acknowledge that we are poor and needy and we need the help from the Lord, if we don't feel we are poor and needy we won't pray to the Lord, searching for Him.
Pray to the Lord for his love, and His blessing is overcome the curse of enemy.
'He loved to curse may he be cursed! He hated to give blessing - may no one bless him'. It is tit-for-tit針鋒相對,' an eye for an eye', as the law allowed.
For those who follow the way of Jesus, the longing for revenge must give way to love, even for enemies.(Matthew 5:43-48)
How?
The Lord stands at the right hand of the needy one, to save his life from those who condemn him. May my life let others know that it is the Lord done it for me.