Ecclesiastes 7:22

For oftentimes also thine own heart knoweth that thou thyself likewise hast cursed others.
— Ecclesiastes 7:22, King James Version

In other translations

World English Bible (WEB)

for often your own heart knows that you yourself have likewise cursed others.

American Standard Version (ASV)

for oftentimes also thine own heart knoweth that thou thyself likewise hast cursed others.

Young's Literal Translation (YLT)

For many times also hath thy heart known that thou thyself also hast reviled others.