देहनाशेन कोऽर्थस्ते कोऽर्थस्ते देहसंस्थया ।भव त्वं प्रकृतारम्भस्तिष्ठत्वेष यथास्थितम्
In plain words
What is your concern with the destruction of the body? What is your concern with its continuance? Remain engaged in the task already at hand; let this body stand as it stands.