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
Pronunciation
Allahu 'Akbar
Meaning
Allah is the Most Great. He recited La ila-ha illallah
Source: Muslim: 1218
Duas from IslamicAPI's Masnun Dua dataset (based on the Quran, hadith, Hisnul Muslim and Rahe Belayat). See the dataset