Chapter on Breastfeeding
Man Lā Yaḥḍuruh al-Faqīh|Volume 3|Book 3|Chapter 47
وَ رَوَى مُحَمَّدُ بْنُ قَيْسٍ عَنْ أَبِي جَعْفَرٍ عَلَيْهِ اَلسَّلاَمُ قَالَ قَالَ رَسُولُ اَللَّهِ صَلَّى اَللَّهُ عَلَيْهِ وَ آلِهِ: "لاَ تَسْتَرْضِعُوا اَلْحَمْقَاءَ فَإِنَّ اَللَّبَنَ يُعْدِي وَ إِنَّ اَلْغُلاَمَ يَنْزِعُ إِلَى اَللَّبَنِ يَعْنِي إِلَى اَلظِّئْرِ فِي اَلرُّعُونَةِ وَ اَلْحُمْقِ".
Muhammad ibn Qays narrated from Abu Ja'far Imam Muhammad ibn Ali Al-Baqir عليه السلام who said that the Messenger of Allah سبحانه وتعالى (peace and blessings be upon him and his family) said: "Do not choose a foolish woman as a wet nurse, for milk can transmit traits. A child is influenced by the milk, meaning by the wet nurse, in foolishness and ignorance."
- Ṣaḥīḥ al-Faqīh