The Sufficient (Vol 4) · Hadith 490 (#Ḥadīth #4)
Chapter 45 | Children’s Fasting and When They Owe Fasting
4ـ عَلِيُّ بْنُ إِبْرَاهِيمَ عَنْ أَبِيهِ عَنِ النَّوْفَلِيِّ عَنِ السَّكُونِيِّ عَنْ أَبِي عَبْدِ الله (عَلَيْهِ السَّلاَم) قَالَ إِذَا أَطَاقَ الْغُلامُ صِيَامَ ثَلاثَةِ أَيَّامٍ مُتَتَابِعَةٍ فَقَدْ وَجَبَ عَلَيْهِ صِيَامُ شَهْرِ رَمَضَانَ.
4. Ali ibn Ibrahim has narrated from his father from al-Nawfaliy from al-Sakuniy who has said the following: “Abu ‘Abd Allah , has said, ‘When a boy is able to fast for three days continuously it is obligatory on him to fast in the month of Ramadan.’”
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).