Bhagavadgita 2.30-39

This, the Indweller in the bodies of all, is ever indestructible, O descendant of Bharata. Wherefore thou oughtest not to mourn for any creature.

Looking at thine own Dharma, also, thou oughtest not to waver, for there is nothing higher for a Kshatriya than a righteous war.

Fortunate certainly are the Kshatriyas, O son of Prithâ, who are called to fight in such a battle, that comes unsought as an open gate to heaven.

But if thou refusest to engage in this righteous warfare, then, forfeiting thine own Dharma and honour, thou shalt incur sin.

The world also will ever hold thee in reprobation. To the honoured, disrepute is surely worse than death.

The great chariot-warriors will believe that thou hast withdrawn from the battle through fear. And thou wilt be lightly esteemed by them who have thought much of thee.

Thine enemies also, cavilling at thy great prowess, will say of thee things that are not to be uttered. What could be more intolerable than this?

Dying thou gainest heaven; conquering thou enjoyest the earth. Therefore, O son of Kunti, arise, resolved to fight.

Having made pain and pleasure, gain and loss, conquest and defeat, the same, engage thou then in battle. So shalt thou incur no sin.

The wisdom of Self-realisation has been declared unto thee. Hearken thou now to the wisdom of Yoga, endued with which, O son of Prithâ, thou shalt break through the bonds of Karma.