Answer

In Paryushan, 1 prahar is generally understood as 3 hours.

So, for boiled water, if someone says it is usable for 1 prahar, it means it should be used within about 3 hours after boiling, according to the practice followed in many Jain households.

Explanation

A full day and night is divided into 8 prahars:

• 4 prahars during the day
• 4 prahars during the night

Since 24 hours ÷ 8 = 3 hours, 1 prahar = 3 hours.

Takeaway

For Paryushan boiled water rules, 1 prahar = approximately 3 hours. However, exact household or sangh practice may vary, so it is best to follow your guru, upashray, or local sangh niyam.