The Sufficient (Vol 4) · Hadith 381 (#Ḥadīth #3)
Chapter 21 | The Case of One who Eats or Drinks out of Forgetfulness During the Month of Ramadan
3ـ عِدَّةٌ مِنْ أَصْحَابِنَا عَنْ سَهْلِ بْنِ زِيَادٍ عَنْ أَحْمَدَ بْنِ مُحَمَّدِ بْنِ أَبِي نَصْرٍ عَنْ دَاوُدَ بْنِ سِرْحَانَ عَنْ أَبِي عَبْدِ الله (عَلَيْهِ السَّلاَم) فِي الرَّجُلِ يَنْسَى فَيَأْكُلُ فِي شَهْرِ رَمَضَانَ قَالَ يُتِمُّ صَوْمَهُ فَإِنَّمَا هُوَ شَيْءٌ أَطْعَمَهُ الله إِيَّاهُ.
3. A number of our people have narrated from Sahl ibn Ziyad from Ahmad ibn Muhammad from ibn abu Nasr from Dawud ibn Sarhan who has said the following: “Abu ‘Abd Allah , about a man who out of forgetfulness eats and drinks in the month of Ramadan, has said, ‘He completes his fast, it is only something Allah fed him.’”
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).