New Revised Standard Version
your heart knows that many times you have yourself cursed others.

Contemporary English Version
Haven't you cursed many others?

New American Bible
for your heart knows that you have many times cursed others.

Douay-Rheims Bible
For thy conscience knoweth that thou also hast often spoken evil of others.

For thy conscience knoweth that thou also hast often spoken evil of others.

also

1 Kings 2:44 And the king said to Semei: Thou knowest all the evil, of which thy heart is conscious, which thou didst to David, my father: the Lord hath returned thy wickedness upon thy own head.

Matthew 15:19 For from the heart come forth evil thoughts, murders, adulteries, fornications, thefts, false testimonies, blasphemies.

Matthew 18:32-35 Then his lord called him: and said to him: Thou wicked servant, I forgave thee all the debt, because thou besoughtest me: . . .

John 8:7-9 When therefore they continued asking him, he lifted up himself and said to them: He that is without sin among you, let him first cast a stone at her. . . .

James 3:9 By it we bless God and the Father: and by it we curse men who are made after the likeness of God.