سُنَنُ النَّسَائِيِّ
Sunan an-Nasa’i 2292
The Book of Fasting
Mentioning the Differences reported from Mansur
أَخْبَرَنَا حُمَيْدُ بْنُ مَسْعَدَةَ، قَالَ حَدَّثَنَا سُفْيَانُ، عَنِ الْعَوَّامِ بْنِ حَوْشَبٍ، قَالَ قُلْتُ لِمُجَاهِدٍ الصَّوْمُ فِي السَّفَرِ قَالَ كَانَ رَسُولُ اللَّهِ صلى الله عليه وسلم يَصُومُ وَيُفْطِرُ .
It was narrated that Al-'Awwam bin Hawshab said: "I said to Mujahid: 'What about fasting while traveling?' He said: 'The Messenger of Allah used to fast (sometimes) and not fast (sometimes)."'
Sunan an-Nasa'i, 2292Sahih (Darussalam)