Yahya related to me from Malik from 'Abdullah ibn Abi Bakr ibnMuhammad ibn Amr ibn Hazm from Abd al-Malik ibn Abi Bakr ibn al-Harithibn Hisham from Khallad ibn as-Sa'ib al-Ansari from his father thatthe Messenger of Allah, may Allah bless him and grant him peace, said,"Jibril came to me and told me to tell my companions, or whoever waswith me, to raise their voices when doing talbiya."
USC-MSA web (English) reference: Book 20, Hadith 34
Arabic reference: Book 20, Hadith 742