Fiqh-us-Sunnah Volume 5, Hajj and ‘Umrah, Fiqh 5.039B.

Malik reported from Nafi’ that Ibn ‘Umar said: “The Prophet (peace be upon him) made his talbiyah in these words: ‘Lab-baika Allahumma Lab-baik. Lab-baika la-Sharika laka lab-baik. In-nal Hamda wan-ni ‘mata laka wal mulk. La Sharika lak (Here I am at Your service, O Allah! You have no partner, Here I am at Your service, O Allah. Verily, all the praise, the grace belong to You, and the kingdom. You have no partner) “‘

Nafi’ said that Ibn ‘Umar used to add, “I am at Your service, I am at Your service. I am at Your service and at Your call. All good is in Your hands, I am at Your service. Our desire is for You, and also our deeds.”

The scholars, however, prefer to restrict the words of talbiyah to the words used by the Prophet (peace be upon him), and there is disagreement among them concerning any addition to them. The majority, however, holds that there is no harm in adding other words to them as Ibn ‘Umar and other Companions of the Prophet (peace be upon him) did. The Prophet (peace be upon him) heard them and did not say anything to them.(Reported by Abu Da’wud and Al-Baihaqi) Malik and Abu Yusuf disliked adding to the talbiyah of the Prophet (peace be upon him).