Narrator:Ā’ishah
وَعَنْ عَائِشَةَ رَضِيَ اللَّهُ عَنْهَا قَالَتْ: إِنَّ حَمْزَةَ بْنَ عَمْرٍو الْأَسْلَمِيَّ قَالَ لِلنَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ أَصُومُ فِي السَّفَرِ وَكَانَ كَثِيرَ الصِّيَامِ. فَقَالَ: «إِنْ شِئْتَ فَصم وَإِن شِئْت فَأفْطر»
‘A'isha said that Hamza b. ‘Amr al-Aslami who was greatly devoted to fasting asked the Prophet whether he should fast when on a journey, and received the reply, “Fast if you like, or break your fast if you like.” (Bukhari and Muslim.)
Reported by Al-Bukhari (No. 1943), Muslim (No. 1121a), At-Tirmidhi (No. 711), An-Nasa’i (No. 2306, 2307, 2308), Ibn Majah (No. 1662), Ahmad (No. 23065, 24429, 24485, 24548) and Ad-Darimi (No. 1645). Cited in Mishkat al-Masabih (No. 2019).