Muwatta Malik · Hadith 656

وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ نَافِعٍ، أَنَّ عَبْدَ اللَّهِ بْنَ عُمَرَ، كَانَ لاَ يَصُومُ فِي السَّفَرِ ‏.‏

Yahya related to me from Malik from Nafi that Abdullah ibn Umar used not to fast while travelling

Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).