Dhammapada Verse 9.6

Sanskrit Verse

माऽवमन्येत पापस्य न मां तद् आगमिष्यति । उदबिन्दुनिपातेन उदकुंभोऽपि पूर्यते । बालः पूरयति पापं स्तोकं स्तोकमप्याचिन्वन् ॥ ६॥

Bhikkhu Ānandajoti's translation

One should not despise a little wickedness (thinking): it will not come to me, through the falling of water drops the water-pot is (quickly) filled, the fool, gathering bit by bit, becomes full of wickedness.