Musnad Abu Ya'la al-Mawsili 115:354

Ubayd Allah narrated to us, Khalid narrated to us, Sa'id narrated to us, from Qatadah, from Anas, that the Prophet (may Allah bless him and grant him peace) saw a man driving a sacrificial camel. He said, "Ride it." The man said, "It is a sacrificial camel." He said, "Ride it, woe to you."