Matthew 27:64

64 Therefore command the tomb to be made secure until the third day; otherwise his disciples may go and steal him away, and tell the people, "He has been raised from the dead,' and the last deception would be worse than the first."

Matthew 27:64 In-Context

62 The next day, that is, after the day of Preparation, the chief priests and the Pharisees gathered before Pilate
63 and said, "Sir, we remember what that impostor said while he was still alive, "After three days I will rise again.'
64 Therefore command the tomb to be made secure until the third day; otherwise his disciples may go and steal him away, and tell the people, "He has been raised from the dead,' and the last deception would be worse than the first."
65 Pilate said to them, "You have a guard of soldiers; go, make it as secure as you can."
66 So they went with the guard and made the tomb secure by sealing the stone.
New Revised Standard Version Bible, copyright 1989, Division of Christian Education of the National Council of the Churches of Christ in the United States of America. Used by permission. All rights reserved.