Al-Kāfi - The Book of Hayd (menses)

Al-Kāfi - The Book of Hayd (menses) Chapter: Signs for Differentiating Between Blood of Hayd and Istihadah َاعِيلَ عَنِ الْفَضْلِ بْنِ شَاذَانَ عَنْ حَ٠َّادِ بْنِ عِيسَى وَابْنِ أَبِي عُ٠ُعَاوِيَةَ بْنِ عَ٠َّارٍ قَالَ قَالَ أَبُو عَبْدِ الله (عَلَيْهِ الْسَّلا٠َ الاسْتِحَاضَةِ وَالْحَيْضِ لَيْسَ يَخْرُجَانِ ٠َكَانٍ وَاحِدٍ إِنَّ دَ٠َ الاسْتِحَاضَةِ بَارِدٌ وَدَ٠َ الْحَيْضِ حَارٌّ.

Blood discharge because of Istihadah (irregular menses) is cold, and because of Hayd (menses) it is hot.’” جهول كالصحيح - Allamah Baqir al-Majlisi (Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (13/230))