1 Do ye indeed speak righteousness, O congregation? do ye judge uprightly, O ye sons of men?
2 Yea, in heart ye work wickedness; ye weigh the violence of your hands in the earth.
3 The wicked are estranged from the womb: they go astray as soon as they be born, speaking lies.
4 Their poison is like the poison of a serpent: they are like the deaf adder that stoppeth her ear;
5 Which will not hearken to the voice of charmers, charming never so wisely.
Wicked people are wicked before they are born.
They are born speaking lies. 
6 Break their teeth, O God, in their mouth: break out the great teeth of the young lions, O LORD.
7 Let them melt away as waters which run continually: when he bendeth his bow to shoot his arrows, let them be as cut in pieces.
8 As a snail which melteth, let every one of them pass away: like the untimely birth of a woman, that they may not see the sun.
9 Before your pots can feel the thorns, he shall take them away as with a whirlwind, both living, and in his wrath.
10 The righteous shall rejoice when he seeth the vengeance: he shall wash his feet in the blood of the wicked.
11 So that a man shall say, Verily there is a reward for the righteous: verily he is a God that judgeth in the earth.
Righteous people will rejoice when they see the vengenace.
They will wash their feet in the blood of the wicked.