Matthew 20:28

just as the Son of Man did not come to be served, but to serve, and to give His life a ransom for many."

Surrounding context

20:27 And whoever desires to be first among you, let him be your slave--

20:28 just as the Son of Man did not come to be served, but to serve, and to give His life a ransom for many."

20:29 Now as they went out of Jericho, a great multitude followed Him.