Mahavira renounced his royal household at thirty, plucking out his own hair by hand as a sign of total detachment
Mahavira's method of leaving ordinary life was itself an act of extreme physical austerity, tearing out his own hair by hand rather than shaving it, which set the tone for the demanding asceticism his teaching would require.
The Kalpa Sutra, a Jain canonical text central to the Shvetambara tradition, gives the biography of Mahavira, the last of the twenty-four Jain Tirthankaras, describing his renunciation of royal life at around age thirty. Rather than cutting his hair with a blade, the traditional account has Mahavira plucking it out strand by strand with his own hand, a practice called kesh-lochan that Jain monastics still perform today as an act of voluntary bodily hardship undertaken without complaint. This method of hair removal was not incidental symbolism but an early demonstration of the total indifference to bodily comfort that would define his subsequent ascetic path, including years of wandering, fasting, and enduring hardship before attaining omniscience. Mahavira's renunciation account functions in Jain tradition much as Antony's or the Buddha's does in theirs, a founding act establishing the pattern later monastics are expected to imitate, though the severity of this specific austerity is distinctively Jain.
Kalpa Sutra