Talbiyah (Labbayk Allahumma Labbayk)
لَبَّيْكَ اللَّهُمَّ لَبَّيْكَ، لَبَّيْكَ لَا شَرِيكَ لَكَ لَبَّيْكَ، إِنَّ الْحَمْدَ وَالنِّعْمَةَ لَكَ وَالْمُلْكَ، لَا شَرِيكَ لَكَ
Transliteration: Labbayk Allahumma labbayk, labbayka la sharika laka labbayk, innal-hamda wan-ni'mata laka wal-mulk, la sharika lak.
Translation: Here I am, O Allah, here I am. Here I am, You have no partner, here I am. Indeed all praise, all blessings and all dominion belong to You. You have no partner.
Source: Sahih al-Bukhari 1549; Sahih Muslim 1184
When to recite: From entering ihram for Hajj or Umrah — repeated often, aloud for men (Sunan Abi Dawud 1814). For women scholars differ: many say quietly, others say loud enough for the women beside her to hear.