Ibn 'Umar (RAA) narrated, ‘The Messenger of Allah (ﷺ) used to start saying the Talbiyah. (after entering the state of Ihram) from the mosque of Dhul Hulaifa (i.e. from the Miqat of Madinah). Agreed upon.

عَنْ اِبْنِ عُمَرَ رَضِيَ اَللَّهُ عَنْهُمَا قَالَ: { مَا أَهَلَّ رَسُولُ اَللَّهِ ‏- صلى الله عليه وسلم ‏-إِلَّا مِنْ عِنْدِ اَلْمَسْجِدِ } مُتَّفَقٌ عَلَيْهِ [1]‏ .‏