If a person observed Saum for some days and then went on a journey.

Narrated Ibn 'Abbas:

Allah's Apostle set out for Mecca in Ramadan and he fasted, and when he reached Al-Kadid, he broke his fast and the people (with him) broke their fast too. (Abu 'Abdullah said, "Al-Kadid is a land covered with water between Usfan and Qudaid.")

حَدَّثَنَا عَبْدُ اللَّهِ بْنُ يُوسُفَ، أَخْبَرَنَا مَالِكٌ، عَنِ ابْنِ شِهَابٍ، عَنْ عُبَيْدِ اللَّهِ بْنِ عَبْدِ اللَّهِ بْنِ عُتْبَةَ، عَنِ ابْنِ عَبَّاسٍ ـ رضى الله عنهما ـ أَنَّ رَسُولَ اللَّهِ ﷺ خَرَجَ إِلَى مَكَّةَ فِي رَمَضَانَ فَصَامَ حَتَّى بَلَغَ الْكَدِيدَ أَفْطَرَ، فَأَفْطَرَ النَّاسُ. قَالَ أَبُو عَبْدِ اللَّهِ وَالْكَدِيدُ مَاءٌ بَيْنَ عُسْفَانَ وَقُدَيْدٍ.