Khallad b. as-Sa’ib on his father’s authority reported Allah's Messenger ﷺ as saying, “Gabriel came to me and commanded me to order my companions to raise their voices in the talbiya.” (The tradition ends by saying they were to raise their voices bil-ihlal au at-talbiya. These are alternative words meaning the same thing, and therefore I have not given any alternative in the translation) Malik, Tirmidhi, Abd Dawud, Nasa’i, Ibn Majah and Darimi transmitted it.