Chapter on Breastfeeding
Man Lā Yaḥḍuruh al-Faqīh|Volume 3|Book 3|Chapter 47
وَ رَوَى فُضَيْلٌ عَنْ زُرَارَةَ عَنْ أَبِي جَعْفَرٍ عَلَيْهِ اَلسَّلاَمُ قَالَ: "عَلَيْكُمْ بِالْوُضَّاءِ مِنَ اَلظُّئُورَةِ فَإِنَّ اَللَّبَنَ يُعْدِي".
Fudayl narrated from Zurarah from Abu Ja'far Imam Muhammad ibn Ali Al-Baqir عليه السلام who said: "Choose healthy wet nurses, for milk can transmit illness."
- Ṣaḥīḥ al-Faqīh, p. 291