Answer

In Jain practice, there is no single fixed scriptural kāl for boiling water. The usual practice is to boil fresh water until it comes to a proper boil, then let it cool in a clean, covered vessel before use.

Explanation

The main purpose is purity and reduced harm. In many Jain homes, boiled water is prepared fresh and used hygienically.

Spiritual Understanding

This supports ahimsa, cleanliness, and careful living, which are important values in Jain Dharma.

Takeaway

Boil fresh water properly, cool it, and use it cleanly. If you mean a specific Jain tradition or vow, the practice can vary.