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.'" (PT)
English reference (PT): Vol. 4, Book 25, Hadith 2923 (PT)
Arabic reference (PT): Book 25, Hadith 3035 (PT)