In Jainism, there isn’t a specific dietary rule linked to a yoga pose called “ekasana.” Jain food discipline is about vows and ahimsa (non-violence) to all living beings, rather than the particular posture you’re doing.

General Jain dietary guidance:

• Eat a vegetarian diet. Many Jains also avoid root vegetables (like onions, garlic, potatoes, carrots, etc.) because pulling them up harms many living beings.
• Avoid meat, fish, eggs, and any animal-derived products beyond dairy (some individuals may restrict dairy as well, but most mainstream Jain practices include dairy).
• Avoid honey and foods that involve harm to living creatures or excessive violence in preparation.
• Fresh fruits, grains, pulses, legumes, seeds, nuts, and dairy (in many communities) are common staples.
• Some sects or individuals may have stricter rules (e.g., complete avoidance of root vegetables or certain spices); others may be more lenient.

If you meant a different term or spelling for a specific practice or fast, please share the exact term, and I can clarify how Jain principles apply.