Man Lā Yaḥḍuruh al-Faqīh
Hadith 3331904 - وَ رَوَى عَنْهُ إِسْمَاعِيلُ بْنُ مُسْلِمٍ أَنَّهُ قَالَ: «إِذَا أَطَاقَ اَلْغُلاَمُ صَوْمَ ثَلاَثَةِ أَيَّامٍ مُتَتَابِعَةٍ فَقَدْ وَجَبَ عَلَيْهِ صِيَامُ شَهْرِ رَمَضَانَ ».
Hadith.1904 - It is narrated from Imam Jafar ibn Muhammad Al-Sadiq (as) through Isma'il ibn Muslim that He said:
"If a boy is able to fast for three consecutive days, fasting the Month of Ramadan becomes obligatory upon him."