It was narrated from Khallad bin Sa’ib, from his father, that the Messenger of Allah (ﷺ) said: “Jibra’il came to me and told me to command my Companions to raise their voices when reciting the Talbiyah.”
It was narrated from Zaid bin Khalid Al-Juhani that the Messenger of Allah (ﷺ) said: “Jibril came to me and said: ‘O Muhammad! Tell your Companions to raise their voices when reciting the Talbiyah, for it is one of the symbols of Hajj.’”
It was narrated from Abu Bakr As-Siddiq that the Messenger of Allah (ﷺ) was asked: “Which actions are best?” He said: “Raising one’s voice and slaughtering the sacrificial animal.”