Abu Umayyah al-Thaqafi (may Allah have mercy on him) narrates that Sayyiduna Mu'awiyah (may Allah be pleased with him) came out after praying Zuhr and said: Stay in your places until I come to you. Then he came out to us wrapped in a cloak, and when he had prayed Asr he said: Shall I not tell you of something the Companions of the Messenger of Allah (peace and blessings be upon him) did? We said: Certainly. He said: They prayed the first prayer with him (peace and blessings be upon him), then remained sitting. He (peace and blessings be upon him) came out to them and said: "Have you still not left (this place)?" They said: No. He (peace and blessings be upon him) said: "If only you could see your Lord: He has opened a door of the heaven and shown your gathering to His angels, boasting about you before them while you are waiting for the prayer."
Hadith Referenceالمعجم الكبير للطبراني / باب الميم / 16904