The Prophet (ﷺ) rode on a camel called 'Kaswa'.When he finally came to Mash'arul Haram (a place in Muzdalifah), he prayed facing the Qibla and said takbeer -

اَللَّهُ أَكْبَرُ

Allahu 'Akbar

Allah is the Most Great. He recited La ila-ha illallah

Reference: Muslim: 1218