Rules about Sailors and People Traveling Very often

2. Muhammad ibn Yahya has narrated from Muhammad ibn al-Husayn from Safwan ibn Yahya from al-‘Ala’ from Muhammad ibn Muslim who has said the following: “One of the two Imam عليه السلام, has said, ‘Sailors when in their vessel are not required to perform their Salah (prayer) as reduced as well as muleteers and camel drivers.’ In another Hadith it is said that muleteers perform their Salah (prayer) as reduced when the journey becomes condensed, like walking two days of journey in one day.’”