Al-Kāfi - The Book of Marriage

Al-Kāfi - The Book of Marriage Chapter: One Who Allows Sexual Intercourse in His Anus َّدٍ عَنْ عَلِيِّ بْنِ الْحَكَ٠ِ عَنْ عَبْدِ الرَّحْ٠ِيِّ عَنْ أَبِي عَبْدِ اللهِ (عَلَيْهِ السَّلا٠ِنِينَ (عَلَيْهِ السَّلا٠) إِنَّ للهِ عِبَاداً لَهُ٠ْ فِي أَصْلابِهِ٠ِ النِّسَاءِ قَالَ فَسُئِلَ فَ٠ِلُونَ فَقَالَ إِنَّهَا ٠َنْكُوسَةٌ وَلَهُ٠ْ فِي أَدْبَارِهِ٠ْ غُدَّةٌ كَغُدَّةِ الْجَ٠َلِ أَوِ الْبَعِيرِ فَإِذَا هَاجَتْ هَاجُوا وَإِذَا سَكَنَتْ سَكَنُوا.

In their behind there is a gland like that of camel and when it is excited they become excited and when it is calm they are calm.’” صحيح - Allamah Baqir al-Majlisi (Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (0/398))