كتاب الحج
Read the English translation first, with the original Arabic directly underneath.
'Abdullah b. 'Umar (Allah be pleased with them) reported that the Messenger of Allah (ﷺ) entered upon the state of Ihram near the mosque at Dhu'l-Hulaifa as his camel stood by it and he said:
Here I am at Your service, O Lord; here I am at Your service: here I am at Your service. There is no associate with You. Here I am at Your service. All praise and grace is due to You and the sovereignty (too). There is no associate with You. They (the people) said that 'Abdullah b. 'Umar said that that was the Talbiya of the Messenger of Allah (ﷺ). Nafi' said: 'Abdullah (Allah be pleased with him) made this addition to it: Here I am at Your service; here I am at Your service; ready to obey You. The Good is in Your Hand. Here I am at Your service. Unto You is the petition and deed (is also for You).
لَبَّيْكَ اللَّهُمَّ لَبَّيْكَ لَبَّيْكَ لاَ شَرِيكَ لَكَ لَبَّيْكَ إِنَّ الْحَمْدَ وَالنِّعْمَةَ لَكَ وَالْمُلْكَ لاَ شَرِيكَ لَكَ