Abu Bakr, from Ḥumayd, from Anas, who heard him say:
“I heard the Prophet ﷺ say: ‘When the Day of Resurrection comes, I will intercede, and I will say, “My Lord, admit into Paradise anyone whose heart contains a mustard-seed’s weight of faith.” They will then enter. After that I will say, “My Lord, admit into Paradise anyone whose heart contains even the slightest amount (1).” ’
Anas added, “It is as though I can see the fingers of the Messenger of Allah even now.”
This is one of the rarest reports in the Ṣaḥīḥ.
Yūsuf here is al-Qaṭṭān, the name being traced to his grandfather. Aḥmad is al-Yarbūʿī.

132 – ʿUbaydah ibn Ḥumayd ibn Ṣuhayb al-Kūfī (Kh, 4)
The erudite scholar, imām, and ḥāfiẓ, Abū ʿAbd al-Raḥmān al-Kūfī, nicknamed “the Cobbler.”
It is said that his clientage was to Banū Taym; others said to Banū Layth; still others said to Ḍabbah—though he was not, in fact, a cobbler.
He transmitted from: al-Aswad ibn Qays, Yazīd ibn Abī Ziyād, Yaḥyā ibn Saʿīd al-Anṣārī, al-Rukayn ibn al-Rabīʿ, al-Aʿmash, Manṣūr, Yūsuf ibn Ṣuhayb, Mūsā ibn Abī ʿĀʾishah, ʿAbd al-ʿAzīz ibn Rufayʿ, ʿAbd al-Malik ibn ʿUmayr, Muṭarrif ibn Ṭarīf, Abū Mālik al-Ashjaʿī, Ḥumayd al-Ṭawīl, ʿAṭāʾ ibn al-Sāʾib, Qābūs ibn Abī Ẓabyān, and many others besides them.