Mark 9:34
"But they held their peace: for by the way they had disputed among themselves, who should be the greatest."
Cross References (ranked by relevance)
Mark 9:50
Salt is good: but if the salt have lost his saltness, wherewith will ye season it? Have salt in yourselves, and have peace one with another.
Romans 12:10
Be kindly affectioned one to another with brotherly love; in honour preferring one another;
1 Peter 5:3
Neither as being lords over God’s heritage, but being ensamples to the flock.