The Sufficient (Vol 4) · Hadith 306 (#Ḥadīth #3)
Chapter 7 | The Rare Ahadith
3ـ مُحَمَّدُ بْنُ يَحْيَى عَنْ مُحَمَّدِ بْنِ الْحُسَيْنِ عَنِ ابْنِ سِنَانٍ عَنْ حُذَيْفَةَ بْنِ مَنْصُورٍ عَنْ مُعَاذِ بْنِ كَثِيرٍ عَنْ أَبِي عَبْدِ الله (عَلَيْهِ السَّلاَم) قَالَ شَهْرُ رَمَضَانَ ثَلاثُونَ يَوْماً لا يَنْقُصُ وَالله أَبَداً.
3. Muhammad ibn Yahya has narrated from Muhammad ibn al-Husayn from ibn Sinan from Hudhayfah ibn Mansur from Mu’adh ibn Kathir who has said the following: “Abu ‘Abd Allah , has said, ‘The month of Ramadan has thirty days; it never by Allah is incomplete.’”
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).