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darimi:3335Naṣr b. ʿAlī > ʿAbd al-Aʿlá > Maʿmar > al-Zuhrī

[Machine] He used to say, "His will is not rewarded except what is difficult," meaning the boy, before he reaches puberty.  

الدارمي:٣٣٣٥حَدَّثَنَا نَصْرُ بْنُ عَلِيٍّ حَدَّثَنَا عَبْدُ الْأَعْلَى عَنْ مَعْمَرٍ عَنْ الزُّهْرِيِّ

أَنَّهُ كَانَ يَقُولُ «وَصِيَّتُهُ لَيْسَتْ بِجَائِزَةٍ إِلَّا مَا لَيْسَ بِذِي بَالٍ» يَعْنِي الْغُلَامَ قَبْلَ أَنْ يَحْتَلِمَ