In Jain Dharma, the proper way to eat rice is with mindful ahimsa and disciplined purity:

• Eat only after it is freshly cooked and clean.
• Avoid rice that is stale, fermented, or kept overnight if it has become unsuitable according to your tradition.
• Do not eat after sunset in the strict Jain practice.
• Eat with awareness, without greed, haste, or waste.
• Prefer simple, sattvic preparation with minimal harm to living beings.
• Use only properly filtered water in preparation and cleaning, where required by your observance.
• Avoid foods mixed with root vegetables or ingredients that increase violence in strict observance.

If you mean rice as a meal item, it is commonly acceptable in Jain food practice when prepared in a clean, non-violent way and eaten with restraint. The exact rules can vary between Digambar and Shwetambar traditions and also by individual vows.