Verse 19

अयथार्थक्रियारम्भैः कदाशावेशपल्लवैः ।क्षीयते कर्मभिस्तुच्छैरायुराहतकर्मभिः

In plain words

By undertakings of action that miss their true aim, by the sprouting shoots of possession by vain hopes, the lifespan is worn away — by deeds that are trivial, deeds that are blighted.