Answer

There is no fixed universal Jain rule that after drinking water one must recite a specific number of Navkar Mantras before standing up.

However, in many Jain families and traditional practices, people may recite the Navkar Mantra once with gratitude and awareness before getting up.

Explanation

The main Jain principle is not the number, but the bhav — inner feeling of reverence, mindfulness, and non-violence.

After drinking water, one should:

• Drink carefully and mindfully.
• Avoid spilling water.
• Maintain respect for water and life forms.
• Remember the Navkar Mantra with devotion if one has that practice.

Takeaway

If your family or guru has taught a specific practice, follow that. Otherwise, reciting one Navkar Mantra with sincere devotion is appropriate.