So it would appear there’s a chiasmus in 1 Pet 3.8, with similar ideas mirrored in the five elements:

Finally, all of you, have
A. unity of mind,
B. sympathy,
X. brotherly love,
B’. a tender heart, and
A’. a humble mind.

The ESV quote above appears to reflect in the translation of the terms in A/A’ the –phron ending of the Greek words.