“Enduring patience is the highest austerity. 'Nibbana is supreme,' say the Buddhas. One who harms another is no monk; one who oppresses another is no recluse.”
Canonical Pali Original: Khantī paramaṃ tapo titikkhā, nibbānaṃ paramaṃ vadanti buddhā; Na hi pabbajito parūpaghātī, samaṇo hoti paraṃ viheṭhayanto.
— Gautam Buddha
The Awakened One, Founder of Dhamma
Pali Canon: Dhammapada 14.184 and Digha Nikaya 14 (Ovada Patimokkha), stating that non-harming (Ahimsa) is the essential definition of a true seeker.