Sunan Ibn Majah
1194
Very Daif+3

It was narrated that Ibn ‘Abbas and Ibn ‘Umar said:“The Messenger of Allah (ﷺ) prescribed two Rak’ah of prayer when traveling; they are complete and are not shortened. And Witr when traveling is Sunnah.”

Very DaifAl-Albani
Very DaifMuhammad Fouad Abd al-Baqi