Hadith 31-69

وَبِهذَا الإِسنادِ قالَ: قالَ رَسُولُ اللَّهِ‏ صَلَّى اللهُ عَلَيْهِ وَآلِهِ: لَيْسَ لِلصَبِيِّ لَبَنٌ خَيْرٌ مِن لَبَنِ اُمِّهِ.

According to the same documentation, God’s Prophet (S) said, “There is no milk better than the mother’s milk for a baby.”