Sahih Bukhari

Narrated Ibn `Umar:That he was in the company of the Prophet (ﷺ) on a journey, riding a troublesome camel belonging to `Umar. The camel used to go ahead of the Prophet, so Ibn `Umar's father would say, ""O `Abdullah! No one should go ahead of the Prophet."" The Prophet (ﷺ) said to him, ""Sell it to me."" `Umar said to the Prophet ""It is for you."" So, he bought it and said, ""O `Abdullah! It is for you, and you can do with it what you like