In Jainism, formal renunciation (diksha) is undertaken by someone who is mature enough to understand and uphold the vows of a monk or nun. Traditionally, a person would undergo diksha as an adolescent or adult after careful guidance from a guru or monk.

Child renunciation is not a standard or common practice in mainstream Jainism today. If there were any rare historical examples, they are exceptional and not the usual path taught in Jain sources.

Key idea: becoming a sadhu or sadhvi involves taking strict vows (like non-violence, truth, non-stealing, celibacy, and non-possessiveness) and receiving proper initiation from an authorized teacher, which typically requires appropriate age and understanding.