The call said on entering the pilgrimage
Answering a summons rather than making a request.
لَبَّيْكَ اللَّهُمَّ لَبَّيْكَ، لَبَّيْكَ لاَ شَرِيكَ لَكَ لَبَّيْكَ، إِنَّ الْحَمْدَ وَالنِّعْمَةَ لَكَ وَالْمُلْكَ لاَ شَرِيكَ لَكَ
Labbayka-llāhumma labbayk, labbayka lā sharīka laka labbayk, inna-l-ḥamda wa-n-niʿmata laka wa-l-mulk, lā sharīka lak.
“Here I am, O Allah, here I am. Here I am, You have no partner, here I am. All praise and favour are Yours, and the dominion. You have no partner.”
The full narration
Narrated Ibn `Umar:I heard Allah's Messenger (ﷺ), while he was in the state of Ihram 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
Source
Ṣaḥīḥ al-Bukhārī · 5915
- Agreed upon as authentic (al-Bukhārī / Muslim)