Prayer: Fasting and Nafilah Prayers During a Ten-Day Stay
Practical Laws of Islam as per the teachings of Ayatullah Sistani
Ruling 1333
A traveller who has made the intention to stay somewhere for ten days must keep obligatory fasts. He can also keep recommended fasts and perform the nāfilah of ẓuhr, ʿaṣr, and ʿishāʾ.