The Sufficient (Vol 5) · Hadith 468 (#Ḥadīth #10)
Chapter 51 | Rule about Unlawful Interest
10- عِدَّةٌ مِنْ أَصْحَابِنَا عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنِ ابْنِ فَضَّالٍ عَنِ ابْنِ بُكَيْرٍ عَنْ عُبَيْدِ بْنِ زُرَارَةَ قَالَ سَمِعْتُ أَبَا عَبْدِ اللهِ يَقُولُ لا يَكُونُ الرِّبَا إِلا فِيمَا يُكَالُ أَوْ يُوزَنُ.
10. A number of our people have narrated from Ahmad ibn Muhammad from ibn Faddal from ibn Bukayr from ‘Ubayd ibn Zurarah who has said the following: “I once heard abu ‘Abd Allah , saying, ‘Riba’ comes in existence only in what is measured or is weighed.”
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).