It is narrated from Sayyiduna Ibn Umar (may Allah be pleased with them both) that at the encampment of the Prophet (peace and blessings be upon him) — which was in the valley near Dhu’l-Hulayfah — an angel came and said: "You are in the blessed plain."
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 5815