It wasnarrated from Zaid bin Khalid Al-Juhani that the Messenger ofAllah(ﷺ) said:
"Jibril came to me and said: 'O Muhammad! Tell yourCompanions to raise their voices when reciting the Talbiyah, for itisone of the symbols of Hajj.'" (DE)
English reference (DE): Vol. 4, Book 25, Hadith 2923 (DE)
Arabic reference (DE): Book 25, Hadith 3035 (DE)