Mark 9:34-38

But they kept silent, for on the way they had discussed with one another which of them was the greatest.

And sitting down, He called the twelve and *said to them, “If anyone wants to be first, he shall be last of all and servant of all.”

And He took a child and placed him among them, and taking him in His arms, He said to them,

“Whoever receives one child like this in My name receives Me; and whoever receives Me does not receive Me, but Him who sent Me.” Dire Warnings

John said to Him, “Teacher, we saw someone casting out demons in Your name, and we tried to prevent him because he was not following us.”