Nahj al-Balāgha
Hadith 2053هُمْ وَاللهِ رَبَّوُا الْإِسْلَامَ كَمَا يُرَبَّى الْفَلُوُّخ مَعَ غَنَائِهِمْ بَأَيْدِيهِمُ السِّبَاطِ وَأَلْسِنَتِهِمُ السِّلاَطِ.
By Allāh, they nurtured Islam with their generous hands and eloquent tongues as a year old calf is nurtured.