لَبَّيْكَ اللَّهُمَّ لَبَّيْكَ، لَبَّيْكَ لَا شَرِيكَ لَكَ لَبَّيْكَ، إِنَّ الْحَمْدَ وَالنِّعْمَةَ لَكَ وَالْمُلْكَ، لَا شَرِيكَ لَكَ
Transliteration
Labbaykallahumma labbayk, labbayka la sharika laka labbayk, innal-hamda wan-ni'mata laka wal-mulk, la sharika lak
English meaning
Here I am, O Allah, here I am. Here I am, You have no partner, here I am. Verily all praise and blessings are Yours, and all sovereignty. You have no partner.
When is it recited?
Recited upon entering ihram and throughout the pilgrimage.
Source
Bukhari, Hajj 26, 1549; Muslim, Hajj 19, 1184