Bhagavad Gita 2.32

यदृच्छया चोप्पन्नं स्वर्गद्वारमपावृतम् |
सुखिन: क्षत्रिया: पार्थ लभन्ते युद्धमीदृशम्

Translation

O Parth, happy are the warriors to whom such opportunities to defend righteousness come unsought, opening for them the stairway to the celestial abodes.