The Talbiyah is the pilgrim's answer to the call of Ibrahim (peace be upon him). It is proclaimed from the moment of entering Ihram and repeated throughout the journey.
Begin at the miqat upon entering Ihram, and repeat it often — when ascending or descending, after prayers, and when meeting other pilgrims.
For Hajj, the Talbiyah stops when the pilgrim begins stoning Jamrat al-Aqabah on the day of Eid. For Umrah, it stops on reaching the Ka'bah to begin Tawaf.
'Labbayk' means: I answer Your call, again and again, in willing submission. The pilgrim affirms that praise, favour and dominion belong to Allah alone.
Raising the voice with the Talbiyah is a sunnah for men, and one of the most distinctive marks of the pilgrimage.
لَبَّيْكَ اللَّهُمَّ لَبَّيْكَ، لَبَّيْكَ لَا شَرِيكَ لَكَ لَبَّيْكَ، إِنَّ الْحَمْدَ وَالنِّعْمَةَ لَكَ وَالْمُلْكَ، لَا شَرِيكَ لَكَ
Labbayka Allahumma labbayk, labbayka la sharika laka labbayk, inna al-hamda wa al-ni'mata laka wa al-mulk, la sharika lak
Here I am, O Allah, here I am. Here I am, You have no partner, here I am. All praise, favour and sovereignty belong to You; You have no partner.
Sahih al-Bukhari 1549
The Companions added phrases of praise and the Prophet ﷺ did not object, so additions of praise are permitted while keeping the reported wording as the core.
Women recite it audibly to themselves without raising their voices in the presence of non-mahram men.