´Khallad bin As-Sa'ib (bin Khalad) narrated from his father:` Who said that the Messenger of Allah said: "Jibril came to me and ordered me to order my Companions to raise their voices with the Ihlal, or; the Talbiyah."
Hadith ReferenceSunan at-Tirmidhi / The Book on Hajj / Hadith: 829