حَدَّثَنَا مَخْلَدُ بْنُ خَالِدٍ حَدَّثَنَا أَبُو أُسَامَةَ عَنْ عُبَيْدِ اللَّهِ عَنْ نَافِعٍ عَنْ ابْنِ عُمَرَ قَالَ قَالَ رَسُولُ اللَّهِ صَلَّی اللَّهُ عَلَيْهِ وَسَلَّمَ بِمَعْنَاهُ زَادَ فَإِنْ کَانَ مُفْطِرًا فَلْيَطْعَمْ وَإِنْ کَانَ صَائِمًا فَلْيَدْعُ
سنن ابودوٗد · Hadith 3737
The tradition mentioned above has also been transmitted by Ibn Umar to the same effect through a different chain of narrators. This version has the additional words: If he is not fasting, he should eat, and if he is fasting, he should leave it.
Sanad
حَدَّثَنَا مَخْلَدُ بْنُ خَالِدٍ حَدَّثَنَا أَبُو أُسَامَةَ عَنْ عُبَيْدِ اللَّهِ عَنْ نَافِعٍ عَنْ ابْنِ عُمَرَ