Abdullah bin Abbas reported,

This verse was revealed, "Indeed, those whom the angels take in death while wronging themselves" [Nisa 4:97]. There was a man in Mecca called Damra from the tribe of Banu Bakr who was ill. He said to his family, "Take me out of Mecca, for I am suffering from the heat."They asked, "Where shall we take you?"He gestured with his hand toward Medina. Then this verse was revealed, "And whoever emigrates for the cause of Allah will find on the earth..." [Nisa 4:100], to the end of the verse.

Azami 12208

Sahih

عن ابن عباس قال

نزلت هذه الآية: {ان الذين توفىهم الملىكة ظالمي انفسهم} كان بمكة رجل يقال له ضمرة من بني بكر، وكان مريضا فقال لأهله: أخرجوني من مكة، فإني أجد الحر. فقالوا: أين نخرجك؟ فأشار بيده نحو المدينة فنزلت هذه الآية: {ومن يهاجر في سبيل الله يجد في الأرض} إلى آخر الآية.

الأعظمي 12208صحيح
Contents
Reference
Commentary
Ayat
Collection
Jami al-Kamil
Book
Tafsir of the great Quran
Chapter
Virtues of Surah Baqarah
Section
His saying, "And whoever emigrates for the cause of Allah will find on the earth many places of refuge and abundance. And whoever leaves his home as an emigrant to Allah and His Messenger and then death overtakes him, his reward has already become incumbent upon Allah. And Allah is Ever Forgiving, Most Merciful"
Numbering
Jami al-Kamil 12208 (2nd edition)
Azami 12208