In the narration of Ibn Uyaynah it is that Abdullah bin Sahl al-Ansari (may Allah be pleased with him) was found in a well. This indicates that he began with the oaths of the Jews and then turned them back onto the two Ansaris, which is contrary to the narration of the group, and the group is more worthy of accurate preservation than a single narrator. Imam al-Shafi'i (may Allah have mercy on him) said: Ibn Uyaynah was not certain whether the Prophet (peace and blessings be upon him) put the Ansaris first in the oaths or the Jews.
The Shaykh said: The statement to be relied upon is that of the one who narrates without doubt, and those who narrate it are all huffaz (master memorisers).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الشهادات / 20737