Romans 8:5 contrasts those who live according to the flesh with those who live according to the Spirit — directly parallel to the obligation here.

In Romans 6:2-15, Paul argues we died to sin so we must no longer live in it — directly grounding the same obligation to not live according to the flesh.

Romans 13:14 commands to make no provision for the flesh — directly echoing the obligation to not live according to it.

1 Corinthians 6:19 says our body is the Holy Spirit's temple, implying we should not live according to flesh — a reason for the obligation.

1 Corinthians 6:20 states we were bought at a price, so we must glorify God in our body — reinforcing the obligation to not live for the flesh.

1 Peter 4:2 calls us to live for God's will rather than human desires — exactly the same obligation to not live according to the flesh.

1 Peter 4:3 describes the past fleshly lifestyle — illustrating what we are obligated to leave behind.

Galatians 5:16 promises that walking by the Spirit prevents gratifying fleshly desires — a parallel solution to the same obligation.

2 Peter 2:10 describes those who follow the flesh — a warning example of what believers are obligated to avoid in Romans 8:12.