Luke 9:21 in the World English Bible
But he warned them and commanded them to tell this to no one,
Context
20 He said unto them, But whom say ye that I am? Peter answering said, The Christ of God.
21 And he straitly charged them, and commanded them to tell no man that thing;
22 Saying, The Son of man must suffer many things, and be rejected of the elders and chief priests and scribes, and be slain, and be raised the third day.