Abu Ubayd, the freed slave of Ibn Azhar (may Allah have mercy on him), says: I performed the Eid prayer with Umar and with Ali (may Allah be pleased with them both), and Uthman (may Allah be pleased with him) was under siege.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 5310