It is narrated from Mujahid (may Allah have mercy on him) that he states: The Messenger of Allah (ﷺ) would express his Talbiyah as follows: “Here I am, O Allah! Here I am, here I am, You have no partner. Here I am, surely all praise and blessings are for You, and the kingdom is Yours, You have no partner.” He said this until one day, when the people were returning, it was as if these words pleased him, so he added these words to it: “Here I am, true life is the life of the Hereafter.” Ibn Jurayj said: In my opinion, this was the day of ‘Arafah.
Hadith Referenceمسند الإمام الشافعي / كتاب الحج / 821
Hadith Takhrijاسناده ضعيف لإرساله : اخرجه البيهقي : 455 ۔ وفى المعرفة السنن والآثار له (2813)۔