From Sahih Bukhari (Hadith 1844):
Narrated Al-Bara:The Prophet (ﷺ) assumed Ihram for Umra in the month of Dhul-Qa'da but the (pagan) people of Mecca refused to admit him into Mecca till he agreed on the condition that he would not bring into Mecca any arms but sheathed
Reference: Bukhari 1844