1 Corinthians 15:46

That which comes first is not the spiritual, but the human; afterwards comes the spiritual;

Romans 6:6

We recognize the truth that our old self was crucified with Christ, in order that the body, the stronghold of Sin, might be rendered powerless, so that we should no longer be slaves to Sin.

Ephesians 4:22-24

For you learned with regard to your former way of living that you must cast off your old nature, which, yielding to deluding passions, grows corrupt;

Colossians 3:9-10

Never lie to one another. Get rid of your old self and its habits,

Treasury of Scripture Knowledge

Summary

Howbeit that was not first which is spiritual, but that which is natural; and afterward that which is spiritual.

That which is natural

Bible References

That which is natural

Romans 6:6
We recognize the truth that our old self was crucified with Christ, in order that the body, the stronghold of Sin, might be rendered powerless, so that we should no longer be slaves to Sin.
Ephesians 4:22
For you learned with regard to your former way of living that you must cast off your old nature, which, yielding to deluding passions, grows corrupt;
Colossians 3:9
Never lie to one another. Get rid of your old self and its habits,