And their eyes were opened; and Jesus sternly charged them, saying,
See that no man knows it.
All Commentaries on Matthew 9:30 Go To Matthew 9
Theophylact of Ochrid
Do you see Christ's humility? They spread abroad His fame in thanksgiving, not out of disobedience. But if in another place Christ says, Go and tell of the glory of God [Lk.8:39], there is nothing contradictory in this. For He wants them to say nothing about Himself, but to speak of the glory of God.