ENOfficial
Aban said: Qatadah was asked about tayammum during a journey. He said: A traditionist reported to me from al-Sha'bi from 'Abd al-Rahman b. Abza on the authority of 'Ammar b. Yasir who reported the Messenger of Allah (ﷺ) as saying: (He should wipe) up to the elbows.
Source: sunnah.com
Other translations
Arabic
حَدَّثَنَا مُوسَى بْنُ إِسْمَاعِيلَ، حَدَّثَنَا أَبَانُ، قَالَ سُئِلَ قَتَادَةُ عَنِ التَّيَمُّمِ، فِي السَّفَرِ فَقَالَ حَدَّثَنِي مُحَدِّثٌ، عَنِ الشَّعْبِيِّ، عَنْ عَبْدِ الرَّحْمَنِ بْنِ أَبْزَى، عَنْ عَمَّارِ بْنِ يَاسِرٍ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " إِلَى الْمِرْفَقَيْنِ " .
sunnah.com