Bhagavadgita 2.128

Bhagavadgītābhāṣya (Śāṅkarabhāṣya) 2.128

yadṛcchayā copapannaṃ svarga-dvāram apāvṛtam |
sukhinaḥ kṣatriyāḥ pārtha labhante yuddham īdṛśam ||