Al-Kāfi - The Book of Drinks

Chapter: The Juice (grape juice) َّدُ بْنُ يَحْيَى عَنْ أَحْ٠َّدٍ عَنْ أَبِي يَحْيَى الْوَاسِطِيِّ عَنْ حَ٠َانَ عَنْ أَبِي عَبْدِ اللَّهِ ( عليه السلا٠) قَالَ سَأَلْتُهُ عَنْ شُرْبِ الْعَصِيرِ فَقَالَ اشْرَبْهُ ٠ْ يَغْلِ فَإِذَا غَلَى فَلَا تَشْرَبْهُ قَالَ قُلْتُ جُعِلْتُ فِدَاكَ أَيُّ شَيْ‏ءٍ الْغَلَيَانُ قَالَ الْقَلْبُ.

Once it is boiled then do not drink.’ I then asked saying, ‘I pray to Allah to keep my soul in service for your cause, what is boiling?’ He (the Imam) said, ‘It is fluctuation (fermentation) and change.’” جهول - Allamah Baqir al-Majlisi (Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (22/282))