If you have broken Chovihār Pachkhān (Chovihar) and want to atone, follow these simple, traditional steps:

• Acknowledge the lapse with humility. Reflect on ahiṃsā and saiyam (self-control) as the core, and resolve to continue observing Chovihār properly.

• Seek forgiveness (kṣamā) and perform pratikraman. Verbally express regret for the lapse and ask for forgiveness from all beings, including your own faults. In practice, many chant or recite a short pratikraman at night.

• Say the Pachkhān with correct intention before resuming. If you are still within the same day’s Chovihār, reaffirm the pledge clearly and then continue your observance. If you have already completed the night’s Chovihār, you may recite the Pachkhān to reestablish the vow for the next period.

• End with Micchāmi Dukkadā (forgiveness) if you are Digambara or as your guru tradition prescribes, and take the vow again mindfully with a calm heart.

• Mindful break: when you do break the fast or resume, do so with gratitude and without greed, keeping the intention of ahimsa and discipline intact.

Notes on tradition:

• Digambaras and Śvetāmbaras both uphold Chovihār to protect non-violence and self-control; exact wording and timings can vary by guru-paramparā and local maryādā, so follow your Ācārya’s guidance. If you have already taken Upvās or a related vow, further Chovihār may not be needed, but you can reaffirm it in line with your local practice. You can find practice examples and wording guidance in commonly used Pachkhān references.
• You can find simple, tradition-safe formulations and practical guidance on Chovihār Pachkhān in related Jain knowledge resources.

You can read more here