Jñāneśvarī (commentary on the Bhagavadgītā) 2.28

2.28

hṛdayāceṃ ḍhilepaṇa |
etha nikayāsi navhe kāraṇa |
heṃ saṃgrāmīṃ patana jāṇa |
kṣatriyāṃsīṃ ||

Faint-heartedness
is never a cause for good here;
know that in battle, this is ruin
for kṣatriyas.”