Kautilya's Arthashastra 8.5.6

8.5.6

pratihatahatāgravegayoḥ pratihatam agrapātabhagnaṃ pravīrapuruṣasaṃhataṃ yudhyeta, na hatāgravegam agrapātahatavīram //

Of armies which have either been repelled or have their front destroyed, that which has been repelled may be taken to fight together with fresh men attached to it, but not the army which has lost many of its brave men in its frontal attack.