Matthew 5:19; 18:1; 23:11

Whoever then annuls one of the least of these commandments, and teaches others to do the same, shall be called least in the kingdom of heaven; but whoever keeps and teaches them, he shall be called great in the kingdom of heaven.
- Matthew 5:19

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At that time the disciples came to Jesus and said, “Who then is greatest in the kingdom of heaven?”
- Matthew 18:1

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But the greatest among you shall be your servant.
- Matthew 23:11