لَبَّيْكَ اللَّهُمَّ لَبَّيْكَ، لَبَّيْكَ لَا شَرِيكَ لَكَ لَبَّيْكَ، إِنَّ الْحَمْدَ، وَالنِّعْمَةَ، لَكَ وَالْمُلْكَ، لَا شَرِيكَ لَكَ

Labbayk Allaahumma labbayk, labbayka laa shareeka laka labbayk, 'innal-hamda, wanni'mata, laka wal mulk, laa shareeka lak.

I am here at Your service, O Allah, I am here at Your service. I am here at Your service, You have no partener, I am here at Your service. Surely the praise, and blessings are Yours, and the dominion. You have no partener. Narrated Ibn 'Umar: I heard the Messenger of Allah (ﷺ), reciting this talbiyyah with his hair tied together. (The Dua is motioned above) He did not utter more words than this.

Reference: Bukhari, 1549, Muslim 2/841, No. 1184