Chapter on Fasting with Authorization
Man Lā Yaḥḍuruh al-Faqīh|Volume 2|Book 2|Chapter 31
وَ رَوَى زُرَارَةُ وَ فُضَيْلٌ عَنْ أَبِي جَعْفَرٍ عَلَيْهِ اَلسَّلاَمُ قَالَ: «اَلْغُسْلُ فِي شَهْرِ رَمَضَانَ عِنْدَ وُجُوبِ اَلشَّمْسِ قُبَيْلَهُ، ثُمَّ يُصَلِّي وَ يُفْطِرُ ».
Zurara and Fudayl narrated from Abu Ja'far عليه السلام who said: "Bathing (ghusl) during the Month of Ramadan should be performed near sunset, just before it, then one should pray and break the fast."
- Ṣaḥīḥ al-Faqīh, p. 105