Spiritual Retreat: Intentionally Committing an Unlawful Act of Iʿtikaf

Practical Laws of Islam as per the teachings of Ayatullah Sistani

Ruling 1738

If a muʿtakif intentionally commits an unlawful act of iʿtikāf despite knowing the religious law (al‑ḥukm al‑sharʿī), his iʿtikāf becomes invalid.

-Ayatullah Sistani, Practical Laws of Islam, Spiritual Retreat (Iʿtikāf)