Sayyiduna Abu Arwa al-Dawsi (may Allah be pleased with him) 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: "All praise is for Allah, who has supported me through these two."
Hadith Referenceالمعجم الكبير للطبراني / مسند من يعرف بالكنى / 19129