How should one in ihram for hajj or umrah say the talbiyah?

لَبَّيْكَ اَللّٰهُمَّ لَبَّيْكَ لَبَّيْكَ لَا شَرِيْكَ لَكَ لَبَّيْكَ اِنَّ الْحَمْدَ وَالنِّعْمَةَ لَكَ وَالْمُلْكَ لَا شَرِيْكَ لَكَ

Here I am, O Allah, here I am. Here I am; You have no partner; here I am. Indeed, all praise and blessing are Yours, and the dominion is Yours; You have no partner.

1. Sahih al-Bukhari, no. (1549), Sahih Muslim, no. (1184), Sunan Abi Dawud, no. (1812), Sunan at-Tirmidhi, no. (825), Sunan an-Nasa'i, no. (2748), Sunan Ibn Majah, no. (2918).