1 Corinthians 1:10-12 documents the actual divisions (following Paul, Apollos) that Paul's body metaphor aims to eliminate by urging equal concern.

1 Corinthians 3:3 identifies jealousy and quarreling as signs of worldliness, the root cause of the divisions that the body metaphor is designed to heal.

In 1 Cor 13:5, love does not seek its own—the foundation of the selfless care that prevents division.

In John 17:21-26, Jesus prays for believers' oneness like the Father and Son, showing the divine priority for the unity Paul calls for in the body.

In 2 Cor 8:16, Paul thanks God for Titus having the same earnest care for you—exactly the mutual care this verse commands.

2 Corinthians 13:11 also urges believers to be of one mind and live in peace, reinforcing Paul's call for no division and equal concern in the body.