Sayyiduna Jabir bin Samurah (may Allah be pleased with him) said: The Prophet (peace and blessings be upon him) came to us while we were split into separate circles, and he (peace and blessings be upon him) said: "What is the matter? I see you scattered in separate groups."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الجمعة / 5904