The Messenger of Allah ﷺ said in his talbiyah, "Here I am, God of Truth, here I am."
أن رسول الله ﷺ قال في تلبيته: لبيك إله الحق لبيك.
Nasai (2752) and Ibn Majah (2920) narrated it, and Ibn Khuzayma (2624), Ibn Hibban (3800), and Hakim (1/449) graded it sahih, all of them from the hadith of Abdul-Aziz bin Abdullah bin Abu Salama, from Abdullah bin Fadl, who related it from Abdul-Rahman Araj, from Abu Hurairah, and he mentioned it. Its isnad is sahih.