Romans 12:10

¹⁰ Be kindly affectionate to one another with brotherly love, in honor giving preference to one another;

brotherly love = philadelphia — mutual affection. Should be “brother love,” not  love for a brother” but “brother love.”

Philippians 2:3 — Let nothing be done through strife or vainglory; but in lowliness of mind let each esteem other better than themselves.

Outdo one another in showing honor.