From Sahih Muslim (Hadith 3097):
Muhammad b. Abu Bakr al-Thaqafi asked Anas b. Malik (Allah be pleased with him), while on their way from Mina to 'Arafa in the morning:What did you do on this day in the company of Allah's Messenger (ﷺ)? Thereupon he said: One of us pronounced Tahlil, and he met with no disapproval, and one of us pronounced Takbir, and he also met with no disapproval
Reference: Muslim 3097