Musannaf Ibn Abi Shayba 3:3474

Abu Bakr narrated to us, he said: Shareek narrated to us, from Zubayd, from Ibn Abi Layla, from Umar, who said: The prayer of travel is two rak'ahs, and Jumu'ah is two rak'ahs, and the two Eids are two rak'ahs, complete, not shortened, upon the tongue of the Messenger of Allah, may Allah bless him and grant him peace.