2 Corinthians 6:13-14

Amplified Bible

¹³ Now in the same way as a fair exchange [for our love toward you]—I am speaking as [I would] to children—open wide [your hearts] to us also.

¹⁴ Do not be unequally bound together with unbelievers [do not make mismatched alliances with them, inconsistent with your faith]. For what partnership can righteousness have with lawlessness? Or what fellowship can light have with darkness?