ومن يهاجر في سبيل الله يجد في الأرض مراغما كثيرا وسعة ومن (4:100) بالانجليزي

(4:100) He who emigrates in the way of Allah will find in the earth enough room for refuge and plentiful resources. And he who goes forth from his house as a migrant in the way of Allah and His Messenger, and whom death overtakes, his reward becomes incumbent on Allah. Surely Allah is All-Forgiving, All-Compassionate. *131

Tafseer Abu-al-A'la Maududi

Page 94 English Traditional

*131). It should be understood clearly that it is only permissible for a person who believes in the true religion enjoined by God to live under the dominance of an un-Islamic system on one of the following conditions. First, that the believer struggles to put an end to the hegemony of the un-Islamic system and to have it replaced by the Islamic system of life, as the Prophets and their early followers had done. Second, that he lacks the means to get out of his homeland and thus stays there, but does so with utmost disinclination and unhappiness.
If neither of these conditions exist, a believer who continues to live in a land where an un-Islamic order prevails, commits an act of continuous sin. To say that one has no Islamic state to go to does not hold water. For if no Islamic state exists, are there no mountains or forests from where one could eke out a living by eating leaves and drinking the milk of goats and sheep, and thus avoid living in a state of submission to unbelief.
Some people have misunderstood the tradition which says: 'There is no hijrah after the conquest of Makka' (Bukhari, 'Sayd', 10; 'Jihad', 1, 27, 194; Tirmidhi, 'Siyar', 33; Nasa'i, 'Bay'ah', 15, etc. - Ed.) This tradition is specifically related to the people of Arabia of that time and does not embody a permanent injunction. At the time when the greater part of Arabia constituted the Domain of Unbelief (Dar al-Kufr) or the Domain of War (Dar al-Harb), and Islamic laws were being enforced only in Madina and its outskirts, the Muslims were emphatically directed to join and keep together. But when unbelief lost its strength and elan after the conquest of Makka, and almost the entire peninsula came under the dominance of Islam, the Prophet (peace be on him) declared that migration was no longer needed. This does not mean, however, that the duty to migrate was abolished for Muslims all over the world for all time to come regardless of the circumstances in which they lived.