ʿUyūn akhbār al-Riḍā
Hadith 6969 - وَبِهذَا الإِسنادِ قالَ: قالَ رَسُولُ اللَّهِ صَلَّى اللهُعَلَيْهِ وَآلِهِ: لَيْسَ لِلصَبِيِّ لَبَنٌ خَيْرٌ مِن لَبَنِ اُمِّهِ.
31-69 According to the same documentation, God’s Prophet (S) said, “There is no milk better than the mother’s milk for a baby.”