hadith
1336
۞
Imam al-Sadiq (AS) said, 'The one to face the severest punishment on the Day of Resurrection will be the man who deposited his sperm in a womb that was forbidden to him.
الإمامُ الصّادقُ (عَلَيهِ الّسَلامُ): إنَّ أشَدَّ الناسِ عَذاباً يَومَ القِيامَةِ رَجُلٌ أقَرَّ نُطفَتَهُ في رَحِمٍ تَحْرُمُ علَيهِ.