Uttarajjhayana 128.1.10

128.1.10

5 puṭho ya daṃsamasaehiṃ | samareva mahāmuṇī /
nāgo saṃgāmasīse vā | sūro abhihaṇe paraṃ ||10||

Suffering from insects a great sage remains undisturbed. As an elephant at the head of the battle kills the enemy, so does a hero (in self-control conquer the internal foe). (10)
He should not scare away (insects), nor keep them off, nor be in the least provoked to passion by them. Tolerate living beings, do not kill them, though they eat your flesh and blood. (11)