Question Summary:
Emigrating from Madinah

Question Detail:

My question is regarding emigrating to medina for the sake of ALLAH in current times and after having raised his children and making them Hafiz and AALIM inshaallah to emigarte to another muslim country like pakistan to work the deen of ALLAH,Is it permissible as i have heard that after emigrating to medina one should stay there for the rest of their life if possible?Kinldy clarify please. 

Answer :

In the Name of Allah, the Most Gracious, the Most Merciful.
As-salāmu ‘alaykum wa-rahmatullāhi wa-barakātuh.
Rasulullah salla Allahu ‘alaihi wa sallam has encouraged staying in Madinah Munawwarah:
عن أبي هريرة، أن رسول الله صلى الله عليه وسلم قال: يأتي على الناس زمان يدعو الرجل ابن عمه وقريبه: هلم إلى الرخاء، هلم إلى الرخاء، والمدينة خير لهم لو كانوا يعلمون، والذي نفسي بيده، لا يخرج منهم أحد رغبة عنها إلا أخلف الله فيها خيرا منه، ألا إن المدينة كالكير، تخرج الخبيث، لا تقوم الساعة حتى تنفي المدينة شرارها، كما ينفي الكير خبث الحديد (الصحيح لمسلم، باب المدينة تنفي شرارها)
Narrated by Abu Hurairah, Rasulullah salla Allahu ‘alaihi wa sallam said: A time will come when a person will call out to his cousin and his relatives, “Come to prosperity” “Come to prosperity.” Whereas, Madinah is better for them. Verily Madinah is like a bellow; it removes the filth. The Hour will not come to be until Madinah dispels the evil ones just as the bellow removes the filth form the steel.” (Muslim)
However, emigrating from Madinah for the sake of Deen is permissible.[1] There are innumerable examples of Sahabah immigrating to various lands for the sake of dīn.[2]
For example, Nabi salla Allahu ‘alaihi wa sallam sent Mu‘āz bin Jabal to Yemen as the Amīr.[3]
And Allah Ta’āla Knows Best
Hisham Dawood
Student Darul Iftaa
Chicago, USA 
Checked and Approved by,
Mufti Ebrahim Desai.