الصَّبِيُّ يُؤْخَذُ بِالصِّيَامِ إِذَا بَلَغَ تِسْعَ سِنِينَ عَلَى قَدْرِ مَا يُطِيقُهُ فَإِنْ أَطَاقَ إِلَى الظُّهْرِ أَوْ بَعْدَهُ صَامَ إِلَى ذَلِكَ الْوَقْتِ فَإِذَا غَلَبَ عَلَيْهِ الْجُوعُ أَوِ الْعَطَشُ أَفْطَرَ[1]
Hadith.1903 - Imam Jafar ibn Muhammad Al-Sadiq (as) said: "A child is to be encouraged to fast when they reach nine years of age, according to their capacity. If they can fast until noon or a little beyond, they should do so. However, if hunger or thirst overwhelms them, they may break their fast."