Answer

If you have broken an oath or vow, ekasana may be one possible penance, but the proper prayaschit depends on the type of vow and the seriousness of the break. In Jain tradition, it is best to do sincere repentance, pratikraman, and then follow a penance advised by a गुरु/साधु-साध्वी.

Explanation

For breaking a vow, the usual spiritual response is:

• Alochana — honestly confessing the lapse
• Pratikraman — repenting and turning back from the mistake
• Pratyakhyan — renewing the vow with stronger resolve
• Prayaschit — performing the appropriate expiation

Common penances may include:

• Ekasana
• Ayambil
• Upvas
• Pratikraman
• Additional restraint or service, depending on the situation

But not every broken vow automatically calls for ekasana. The right penance depends on:

• what vow was broken
• whether it was intentional or accidental
• how serious the lapse was
• your physical strength and spiritual capacity

Spiritual Understanding

In Jain Dharma, the goal of prayaschit is not punishment. Its purpose is:

• to cleanse the mind
• to reduce carelessness
• to restore self-discipline
• to strengthen sincerity in vows

So the most important thing is true remorse and a firm return to restraint.

Takeaway

Yes, ekasana can be part of prayaschit, but it should not be chosen casually. For a broken vow, first do sincere repentance and pratikraman, and if possible, take the guidance of a Jain guru for the proper penance.