Sayyiduna Anas (may Allah be pleased with him) said: Sayyiduna Abu Musa (may Allah be pleased with him) was in command of the army of the people of Basrah, and Sayyiduna al-Nu'man bin Muqarrin (may Allah be pleased with him) was in command of the army of the people of Kufah, and I was between the two of them. They both arranged to meet me in the morning. Then one of them led his own men in prayer, and afterwards came to us and prayed with us as well.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 3652