Was not the earth of Allah spacious enough for you to migrate therein?

What is the meaning of the Verse: {Indeed, those whom the angels take [in death] while wronging themselves – [the angels] will say, “In what [condition] were you?” They will say, “We were oppressed in the land.” The angels will say, “Was not the earth of Allah spacious [enough] for you to migrate therein?” For those, their refuge is Hell – and evil it is as a destination. * Except for the oppressed among men, women and children who cannot devise a plan nor are they directed to a way – * For those perhaps Allah will pardon them, and Allah is ever Pardoning and Forgiving.}