Answer

In Jain practice, if water is boiled at 7:00, it is generally considered usable for about one prahar, which is approximately 3 hours.

So, water boiled at 7:00 may be used until about 10:00.

Explanation

Boiled water is used in Jain Dharma to reduce harm to tiny living beings in water. After some time, Jain tradition teaches that new subtle life may again develop or enter the water, so it should not be kept and used indefinitely.

Some traditions and families may follow stricter or slightly different timing rules, so it is best to follow the guidance of your Guru, Sangh, or family tradition.

Takeaway

Water boiled at 7:00 is generally used until around 10:00 in Jain practice.