صحيح البخاري

Narrated Ibn `Umar:

I heard Allah's Messenger, while he was in the state of lhram and his hair was stuck together with gum, saying, "Labbaik, Allahumma Labbaik, Labbaik La Sharika laka Labbaik. Inn-al-Hamda Wan-Ni'mata Laka wal-Mulk, La Sharika Lak." He did not add anything to those words.