3 Bible Verses about Beating Oneself

No, I bruise my body and make it my slave, lest I, who have called others to the contest, should myself be rejected.

Meanwhile the tax-gatherer stood at a distance, not venturing even 'to raise his eyes to Heaven'; but he kept striking his breast and saying 'O God, have mercy on me, a sinner.'

All the people who had collected to see the sight watched what occurred, and then went home beating their breasts.