In Jainism, not wearing chappals (footwear) inside temples or during certain religious activities is based on the principles of ahimsa (non-violence), purity, and respect:

1. Ahimsa (Non-violence): Walking barefoot helps practitioners be more aware of their steps and avoid accidentally killing small insects or organisms that might be on the ground. Wearing shoes or chappals can harm these tiny beings, which goes against the core Jain principle of non-violence.

1. Purity and Cleanliness: Jain temples and places of worship are considered extremely pure and sacred. Footwear can carry dust, dirt, and impurities from outside, which is not appropriate for such holy places.

1. Humility and Respect: Removing chappals before entering a temple or while performing rituals is a mark of humility and respect towards the Tirthankaras and the sanctity of the space.

Therefore, Jains refrain from wearing chappals in temples and during religious rituals to uphold the values of non-violence, purity, and reverence.