Answer

No, vomiting by mistake or involuntarily does not usually break the Moksha Saptami fast in Jain observance.

Explanation

In Jain dharma, a fast is generally considered broken by intentional consumption of food or drink that is not allowed in the vow. If vomiting happens unintentionally, due to illness, weakness, or some bodily reaction, it is not treated the same as knowingly breaking the fast.

However:

• If you had eaten or drunk something prohibited, then the vow may need to be reviewed according to the specific fast rules.
• If you are unsure, it is best to do alochana/pratikraman and follow the guidance of your guru or sadhvi/sadhu.

Spiritual Understanding

Jain fasting is not only about the body, but also about inner intention, discipline, and purity of vow. Accidental bodily actions do not carry the same karmic meaning as deliberate violation. What matters most is sincerity, restraint, and repentance if needed.

Takeaway

If vomiting happens accidentally during Moksha Saptami fast, the fast is generally not considered broken. Still, for exact observance, follow your local Jain tradition and spiritual guide.