Verse 19

इदं नियतितः प्राप्तं कर्तव्यं तद्विजन्मनाम् ।मध्याह्नमुपपन्नं यत्कर्तव्यं नावसीदति

In plain words

This duty of the twice-born has arrived through niyati: midday has come, and what is to be done brooks no lapse.