The Sufficient (Vol 7) · Hadith 881 (#Ḥadīth #12)

12- أَحْمَدُ بْنُ مُحَمَّدٍ عَنِ ابْنِ فَضَّالٍ عَنْ حَفْصٍ وَغَيْرِ وَاحِدٍ مِنْ أَصْحَابِنَا عَنْ أَبِي عَبْدِ اللهِ قَالَ سُئِلَ عَنِ الرَّجُلِ يُقْسِمُ عَلَى أَخِيهِ قَالَ لَيْسَ عَلَيْهِ شَيْءٌ إِنَّمَا أَرَادَ إِكْرَامَهُ.

12. Ahmad ibn Muhammad has narrated from ibn Faddal from Hafs and from more than one person of our people who has narrated the following: “Once abu ‘ Abd Allah , was asked about the case of a man who swears by his brother. He (the Imam) said, ‘It does not have any valid effect on him; he only wanted to honor and respect him.’”

Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).