Verse 18

न किंचिदपि कर्तव्यं यदि नाम मयाधुना ।तत्कस्मान्न करोमीदं किंचित्प्रकृतकर्म वै

In plain words

If indeed there is nothing whatever that must be done by me now, then why should I not do this -- whatever task lies at hand?