Hadith.2569 - One of our companions wrote to Abu Ibrahim (as) regarding a man who entered Masjid al-Shajarah, prayed, and entered Ihram. Then, before reciting the Talbiyah, he left the mosque and decided to nullify his Ihram by engaging in intercourse with women.
Imam (as) wrote in reply: "Yes" or "There is no harm in it."