Al-Kāfi
Hadith 17587- عَلِيٌّ عَنْ أَبِيهِ عَنِ ابْنِ أَبِي عُمَيْرٍ عَنْ بَعْضِ أَصْحَابِنَا عَنْ أَبِي عَبْدِ اللهِ (عَلَيْهِ السَّلام) قَالَ الرَّضَاعُ الَّذِي يُنْبِتُ اللَّحْمَ وَالدَّمَ هُوَ الَّذِي يَرْضِعُ حَتَّى يَتَمَلَّى وَيَتَضَلَّعَ وَيَنْتَهِيَ نَفْسُهُ.
7. Ali has narrated from his father from Ibn Abi ‘Umayr from certain persons of our people who has said the following: “Abu ‘Abd Allah (a.s.), has said, ‘Breastfeeding that grows flesh and blood is the one that he drinks until he feels weary and disinterested and his breath ends.”’