Abu al-Aliyah al-Bara' (may Allah have mercy on him) said: Sayyiduna Abdullah bin al-Zubayr (may Allah be pleased with them both) and Sayyiduna Abdullah bin Safwan (may Allah be pleased with him) were sitting when Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) passed by them while performing tawaf. One of them said: Is there anyone left better than this man? The other said: Call him. When he (may Allah be pleased with him) had completed his tawaf and offered two rak'ahs, the messenger told him that Abdullah bin al-Zubayr and Abdullah bin Safwan were calling him. He came, and Abdullah bin Safwan (may Allah be pleased with him) said: O Abu Abd al-Rahman, why do you not pledge allegiance to the Commander of the Faithful, Abdullah bin al-Zubayr? All the people, the people of Iraq and most of the people of Syria have pledged allegiance to him. He (may Allah be pleased with him) said: By Allah, I will not pledge allegiance; you have taken up your swords to shed the blood of Muslims.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب قتال أهل البغي / 16808