1 Corinthians 15:46

However, the spiritual is not first, but the natural; then the spiritual.

Romans 6:6

knowing this, that our old self was crucified with Him, in order that our body of sin might be done away with, so that we would no longer be slaves to sin;

Ephesians 4:22-24

that, in reference to your former manner of life, you lay aside the old self, which is being corrupted in accordance with the lusts of deceit,

Colossians 3:9-10

Do not lie to one another, since you laid aside the old self with its evil practices,

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
knowing this, that our old self was crucified with Him, in order that our body of sin might be done away with, so that we would no longer be slaves to sin;
Ephesians 4:22
that, in reference to your former manner of life, you lay aside the old self, which is being corrupted in accordance with the lusts of deceit,
Colossians 3:9
Do not lie to one another, since you laid aside the old self with its evil practices,