The Prophet (ﷺ) went out in the company of 1300 to 1500 of his companions in the year of Al-Hudaibiya, and when they reached Dhul-Hulaifa, he garlanded and marked his Hadi and assumed the state of Ihram.
Reference: Sahih al-Bukhari 4157, 4158 In-book : Book 64, Hadith 201 USC-MSA web (English) : Vol. 5, Book 59, Hadith 477 (deprecated)
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