Short answer: Before drinking boiled water in Paryushan, take a simple “Pāṇī-pān nu Pachchakkhan” (vow) stating you will drink only boiled, filtered, life-free water, during the permitted daylight time, and ask forgiveness if any lapse occurs.

You may say it like this (choose one language and speak it with folded hands before an idol/Guru or mentally):

• Gujarati:

“Huṁ āje sāyaṁkāl sudhī keval ubālelūṁ ane chāṇelūṁ jīvarahit pāṇī ja pīś. Rātre pāṇī na pīś. Maṇḍa-buddhithi koī chūk thāy to ‘Micchāmi Dukkaḍaṁ’.”

• Hindi:

“मैं आज सायंकाल तक केवल उबाला हुआ, छनकर जीव-रहित पानी ही पीऊँगा/पीऊँगी। रात में पानी नहीं लूँगा/लूँगी। कोई भूल हो जाए तो ‘मिच्छामि दुक्कडम्’।”

• Simple English:

“For today, until sunset, I will drink only boiled and properly filtered, life-free water. I will not take water at night. If I err in any way, Micchhami Dukkadam.”

Tradition notes:

• Shwetāmbara: Commonly restrict to boiled, filtered water only during daylight (sunrise to sunset). State the time limit clearly in the pachchakkhan.
• Digambara: Also keep to day-time only; specify “today, till sunset, I will take only boiled (same-day) water.” If your local maryādā adds details (own vessel, covered storage, place), include them in the vow.

How to do it briefly: 1) Stand before Jin idol or sacred text, recite Navkar, then speak the pachchakkhan. 2) Specify the time limit (e.g., “today till sunset”). 3) Then take the first sip of boiled, filtered water.

For related pachchakkhan examples: