Sayyiduna Ibn Umar (may Allah be pleased with him) says that a man stood up at one of the doors of the Prophet's Mosque and asked: O Messenger of Allah (peace and blessings be upon him), what should the one in ihram wear? He then mentioned the whole account like the previous hadith.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 9060