Hadith 2059
Abd Allaah bin Masud said “Fosterage is not valid except by what strengthens love and grows flesh. ” Abu Musa said “Do not ask us so long as this learned man is among us”
Hadith 2060
The aforesaid tradition has also been narrated by Ibn Masud through a different chain of narrators and to the same effect from the Prophet ﷺ. This version has the words anshaz al-‘azma meaning which nourishes bones and makes them sturdy and vigorous.