Does the verse: "And those who were killed then died" indicate that the virtue of the Muhajir is like that of the martyr or close to it?

Perhaps the questioner is referring to the verse: "And those who emigrated for the cause of Allah and then were killed or died – Allah will surely provide them with a good provision. And indeed, Allah is the best of providers." [Al-Hajj:58]. This verse was revealed to clarify the status and virtue of the emigrants, whether they were killed or died in their beds, equating them in the good provision from Allah. Some scholars held that the martyr who is killed is superior to one who dies a natural death, while others believed they are equal in reward.

Among the proofs for preferring the one who is killed is his (peace be upon him) being asked about the best Jihad, to which he replied: "He whose blood is spilled and whose horse is wounded." Among the proofs for equality are the aforementioned verse, and the Almighty's saying: "And whoever leaves his home as an emigrant to Allah and His Messenger and then death overtakes him – his reward has already fallen upon Allah." [An-Nisa:100], and the Hadith of Umm Haram, and the Prophet's (peace be upon him) saying in the Hadith of Abdullah ibn Atik: "Whoever leaves his home as an emigrant for the cause of Allah, then falls off his mount and dies, or is stung by a snake and dies, or dies a natural death; his reward has already fallen upon Allah."

It is stated in Tafsir Adwa' al-Bayan that those who are killed in the cause of Allah are provided with a good provision, as in the Almighty's saying: "And never think of those who have been killed in the cause of Allah as dead. Rather, they are alive with their Lord, receiving provision." [Al-Imran:169]. Similarly, those who die not in combat, as in the verse: "And whoever leaves his home as an emigrant to Allah and His Messenger and then death overtakes him – his reward has already fallen upon Allah." [An-Nisa:100], and whoever's reward falls upon Allah, He provides them with a good provision.