حدثنا أبي - رحمه الله - قال: حدثنا محمد بن يحيى، عن محمد بن أحمد، عن أحمد ابن هلال، عن محمد بن سنان، عن محمد بن عبد الله بن رباط، عن محمد بن النعمان الأحول، عن أبي عبد الله عليه السلام في قول الله عز وجل: " ولما بلغ أشده واستوى آتيناه حكما و علما " قال: أشده ثمان عشر سنة، واستوى: التحى.
1.	We were told by my father, may Allah grant him mercy, that he said: We were told by Muhammed bin Yahya, from Muhammed bin Ahmad, from Ahmad ibn Hilal, Muhammed bin Sinan, from Muhammed bin Abdullah bin Ribat, from Muhammed bin Nu’man, the half-blinded, from Abu Abdillah, peace be upon him, with regards to the saying of Allah, Exalted and Glorious is He: «Then, when he reached maturity [1] and became even , We brought to him rulership and knowledge.» (12:22) He said: Maturity is eighteen years, and when he became even, he began to grow a beard.