Musnad Ahmad 87:4

Abu al-Nadr narrated to us, Isra'il narrated to us, from Jabir, from 'Amir, from Qays ibn Sa'd ibn 'Ubadah, who said: There was nothing that existed during the time of the Messenger of Allah, peace and blessings of Allah be upon him, except that I saw it, except for one thing: "that the Messenger of Allah, peace and blessings of Allah be upon him, used to have *qalas* performed for him on the day of Fitr." Jabir said: It is playing/sport.