The Importance of Emigration

This is one of the first verses of Hijra, right? Fast forward like a year or two, surat an nisa came down. We can say any, some of it pre-or some of it post or hood. And then one of the last ones that basically says, if you do not emigrate, you are a major sinner. You have committed a major hood and it is possible Allah will punish you if you don't emigrate now.