Musnad Abu Ya'la al-Mawsili 129:14

Abu Bakr narrated to us, Abu Khalid al-Ahmar narrated to us, from Humayd, from Anas, that the Messenger of Allah (ﷺ) had a she-camel called al-Adba' which would not be outrun. Then a Bedouin came on a young camel of his and outran it. This distressed the Muslims, and they said, "O Messenger of Allah, al-Adba' has been outrun!" The Messenger of Allah (ﷺ) said, "It is a right upon Allah that nothing of this world is raised up except that He lowers it."