Answer

No, you do not get pāp for this if it happened unintentionally during sleep, like nightfall.

In Jain Dharma, pāp is mainly connected with intention, attachment, passion, and conscious action. If semen came out while sleeping without your deliberate act, it is not the same as intentionally doing masturbation.

Explanation

Nightfall is a natural bodily process. Since you were asleep and did not willingly do it, you should not feel guilty or mentally disturbed.

However, Jain Dharma encourages us to keep the mind pure and reduce sensual thoughts while awake. So, if during the day one repeatedly thinks lustful thoughts, watches impure content, or intentionally excites the mind, that can increase attachment and karmic bondage.

Spiritual Understanding

What matters spiritually is:

• Was it intentional? In your case, no.
• Was there conscious desire or action? While sleeping, no.
• Can you improve purity of mind while awake? Yes.

So do not panic. Calmly do simple spiritual practices like:

• Recite Navkar Mantra with devotion.
• Do a small pratikraman or inner reflection if your mind feels disturbed.
• Avoid lustful media and thoughts during the day.
• Sleep with peaceful thoughts, prayer, or mantra remembrance.

Takeaway

Unintentional nightfall during sleep is not deliberate pāp. Do not feel guilty. Focus on purity of thoughts, self-control, and peaceful spiritual practice while awake.