Matthew 20:25
But Jesus called them unto him, and said, Ye know that the princes of the Gentiles exercise dominion over them, and they that are great exercise authority upon them.
Cross-reference
Matthew 11:29 shows Jesus 'gentle and humble in heart' — the direct opposite of the Gentile rulers' lording over others.
Matthew 18:3 calls for childlike humility — the antithesis of the worldly power Jesus warns against here.
Matthew 18:4 states the greatest is the most humble — directly countering the Gentile pattern of lording over others.
Daniel 5:19 explicitly says the king killed or spared whomever he wished — directly illustrating the 'lord it over' mentality.
Mark 10:42 records the exact same saying — a parallel account of Jesus' teaching on Gentile rulers.
John 13:12-17 enacts Jesus' teaching: the Master serves, modeling the servant leadership Jesus now commands.
Mark 9:35 gives Jesus' positive teaching on servant leadership — the direct counterpart to the negative Gentile example here.
In 1 Peter 5:3, Peter echoes Jesus' contrast: leaders should not domineer but lead by example, directly applying the teaching against worldly lordship.
Daniel 2:37-45 describes God's eternal kingdom replacing earthly ones — a contrast to the Gentile rulers' temporary, oppressive power.