It wasnarrated from Salim, from his father:
"I heard the MessengerofAllah (ﷺ) reciting the Talbiyah when he entered Ihram withsomething applied to his head to keep the hair together.'" (IT)
English reference (IT): Vol. 4, Book 25, Hadith 3047 (IT)
Arabic reference (IT): Book 25, Hadith 3163 (IT)