It is narrated from Sayyiduna Abu Arwa al-Dawsi (may Allah be pleased with him) that he said: "I was sitting with the Messenger of Allah (peace and blessings be upon him) when Sayyiduna Abu Bakr and Sayyiduna Umar (may Allah be pleased with them both) appeared, so he (peace and blessings be upon him) said: 'Al-hamdu lillahi alladhi ayyadani bihima' (All praise is for Allah who has supported me through these two)."
No one narrated this hadith from al-Nadr bin Arabi (may Allah have mercy on him) except Bishr bin Ubays (may Allah have mercy on him), and this hadith is not narrated from Sayyiduna Abu Arwa (may Allah be pleased with him) except with this chain.
Hadith Referenceالمعجم الأوسط / باب الميم / 6262
Hadith Gradingمحدثین:إسناده ضعيف لضعف عاصم بن عمر بن حفص
Hadith Takhrij«قال الهيثمي: وفيه عاصم بن عمر بن حفص وثقه ابن حبان وقال يخطئ ويخالف وضعفه الجمهور وبقية رجاله ثقات «مجمع الزوائد ومنبع الفوائد، ج 9، ص 51»» «أخرجه الحاكم فى «المستدرك» برقم: 4473، والطبراني فى «الكبير» برقم: 926»