the Messenger of Allah prayed Zuhr in Al-Baida then he rode up the mountain of Al-Baida; and began the Talbiyah for Hajj and 'Umrah, when he had prayed Zuhr (Daif)  

أَنَّ رَسُولَ اللَّهِ ﷺ صَلَّى الظُّهْرَ بِالْبَيْدَاءِ ثُمَّ رَكِبَ وَصَعِدَ جَبَلَ الْبَيْدَاءِ فَأَهَلَّ بِالْحَجِّ وَالْعُمْرَةِ حِينَ صَلَّى الظُّهْرَ