It is narrated from al-Zuhri (may Allah have mercy on him) that Abdullah bin Abdullah bin al-Walid died at al-Suqya in the time of Uthman bin Affan (may Allah be pleased with him) while he was in the state of ihram, and his head was not covered.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الجنائز / 6650