Man Lā Yaḥḍuruh al-Faqīh

Hadith 411
fasting
]فأما صوم التطوع في السفر[ 1981 - فَقَدْ قَالَ اَلصَّادِقُ عَلَيْهِ اَلسَّلاَمُ : «لَيْسَ مِنَ اَلْبِرِّ اَلصَّوْمُ فِي اَلسَّفَرِ».
[Regarding fasting voluntarily while traveling] Hadith.1981 - Imam Jafar ibn Muhammad Al-Sadiq (as) said: "Fasting while traveling is not an act of righteousness."
Source: Shaykh Muḥammad b. ʿAlī al-Ṣaduq