Hammad al-Sindi narrates that he asked Imam as-Sadiq (a.
Hammad al-Sindi narrates that he asked Imam as-Sadiq (a.s.), "I visit the cities of polytheism [i.e., of the polytheists]; and there are some among us who say that 'if you die over there, you will be raised [in the Hereafter] along with them.'" The Imam asked me, "O Hammad, when you are over there do you talk about our affair [i.e., our truth] and call [people] to it?" I replied, "Yes." The Imam asked me, "When you are in these cities, the cities of Islam, do you talk about our affair and call [people] to it?" I replied, "No." The Imam said, "If you die over there [in the land of the non-Muslims], you will be raised as an ummah by yourself, and there will be light in front of you!"[^6] General Rules Based on these and other similar ahadith, and other religious proofs, the jurists (mujtahidin) have issued the following rulings: It is recommended for a believer to travel to non-Muslim countries for the purpose of spreading the religion [of Islam] and its teaching, provided that he can safeguard himself and his young children against the dangers of loss of the faith.
The Prophet said to Imam 'Ali, "If Allah guides a person from among His servants through you, then that is better than everything between the east and the west on which the sun shines."[^7] When asked by a person for a counsel, he said, "I advise you not to associate anything with Allah...and to call the people to Islam.
You should know that [the reward] for you for each person who answers [your call] is [equal to] emancipating a slave from the children of [Prophet] Ya'qûb." ^8 (See the question-answer section below.) A believer is allowed to travel to non-Muslim countries provided that he is sure or has confidence that the journey would not have a negative impact on his faith and the faith of those who are related to him.
Similarly, a believer is allowed to reside in non-Muslim countries provided that his residing there does not become a hurdle in the fulfilling of his religious obligations towards himself and his family presently as well as in future.
(See the question-answer section below.) It is haram to travel to non-Muslim countries in the East or the West if that journey causes loss of the faith of a Muslim, no matter whether the purpose of that journey is tourism, business, education, or residence of a temporary or permanent nature, etc.