 أَبِی ره قَالَ حَدَّثَنِی مُحَمَّدُ بْنُ یَحْیَی الْعَطَّارُ عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنِ ابْنِ فَضَّالٍ عَنْ عُبَیْدِ بْنِ زُرَارَهَ عَنْ عَبْدِ اللَّهِ بْنِ أَعْیَنَ قَالَ سَمِعْتُ أَبَا جَعْفَرٍ ع یَقُولُ إِذَا زَنَی الرَّجُلُ أَدْخَلَ الشَّیْطَانُ ذَکَرَهُ فَعَمِلَا جَمِیعاً وَ کَانَتِ النُّطْفَهُ مِنْهُمَا وَ خُلِقَ مِنْهُمَا وَ خُلِقَ مِنْهَا الْوَلَدُ وَ یَکُونُ شِرْکَ الشَّیْطَانِ.
4.  It  is  narrated  that  Imam  Muhammad  Baqir    said, “When a person commits fornication, he is not alone and the  Shaitaan accompanies  him. Both of them  commit this sin together. The semen is of one person only but the child belongs to both of them. Hence he is a partner of Shaitaan.”