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Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
bayhaqi:12975 – Abū Bakr > Ibn ʿUyaynah > Yaḥyá b. Saʿīd > Saʿīd b. al-Musayyib > ʿUmar

[Machine] Omar used to impose on the young boy when he started  

البيهقي:١٢٩٧٥ – قَالَ وَحَدَّثَنَا أَبُو بَكْرٍ ثنا ابْنُ عُيَيْنَةَ عَنْ يَحْيَى بْنِ سَعِيدٍ عَنْ سَعِيدِ بْنِ الْمُسَيِّبِ

أَنَّ عُمَرَ ؓ كَانَ يَفْرِضُ لِلصَّبِيِّ إِذَا اسْتَهَلَّ  

See similar narrations below:

Collected by Suyūṭī