Matthew 23:11

Whoever is greatest among you must be your servant.

Galatians 5:13

For you, brothers, were called to freedom; only you must not let your freedom be an excuse for the gratification of your lower nature, but in love be slaves to one another.

Matthew 20:26-27

It is not to be so among you, but whoever wants to be great among you must be your servant,

Mark 10:43-44

but this is not to be the case among you. Whoever wants to be great among you must be your servant,

Luke 22:26-27

But you are not to do so. On the contrary, the greatest among you must be like the youngest and the leader as the servant.

John 13:14-15

If I then, your Lord and Teacher, have washed your feet, you too ought to wash one another's feet.

1 Corinthians 9:19

Yes, indeed, though I am free from any human power, I have made myself a slave to everybody, to win as many as possible.

2 Corinthians 4:5

For I am not proclaiming myself but Christ Jesus as Lord, and myself a slave of yours for Jesus' sake.

2 Corinthians 11:23

Are they ministers of Christ? So am I. I am talking like a man that has gone crazy -- as such I am superior! -- serving Him with labors greater by far, with far more imprisonments, with floggings vastly worse, and often at the point of death.

Philippians 2:5-8

Keep on fostering the same disposition that Christ Jesus had.

Treasury of Scripture Knowledge

Summary

But he that is greatest among you shall be your servant.

Bible References

General references

Matthew 20:26
It is not to be so among you, but whoever wants to be great among you must be your servant,
Mark 10:43
but this is not to be the case among you. Whoever wants to be great among you must be your servant,
Luke 22:26
But you are not to do so. On the contrary, the greatest among you must be like the youngest and the leader as the servant.
John 13:14
If I then, your Lord and Teacher, have washed your feet, you too ought to wash one another's feet.
1 Corinthians 9:19
Yes, indeed, though I am free from any human power, I have made myself a slave to everybody, to win as many as possible.
2 Corinthians 4:5
For I am not proclaiming myself but Christ Jesus as Lord, and myself a slave of yours for Jesus' sake.
2 Corinthians 11:23
Are they ministers of Christ? So am I. I am talking like a man that has gone crazy -- as such I am superior! -- serving Him with labors greater by far, with far more imprisonments, with floggings vastly worse, and often at the point of death.
Galatians 5:13
For you, brothers, were called to freedom; only you must not let your freedom be an excuse for the gratification of your lower nature, but in love be slaves to one another.
Philippians 2:5
Keep on fostering the same disposition that Christ Jesus had.