Dhammapada Verse 18.5

Sanskrit Verse

अनुपूर्वेण मेधावी स्तोकं स्तोकं क्षणे क्षणे । कर्मारो रजतस्येव निर्धमेत् मलमात्मनः ॥ ५॥

Bhikkhu Ānandajoti's translation

One by one, little by little, moment by moment, a wise man should remove his own impurities, as a smith removes the dross of silver.