Thematic Bible: Fraud impossible in

"Sir, we remember that, during his lifetime, that impostor said 'I shall rise after three days.' So order the tomb to be made secure till the third day. Otherwise his disciples may come and steal him, and then say to the people 'He has risen from the dead,' when the latest imposture will be worse than the first." "You may have a guard," was Pilate's reply; "go and make the tomb as secure as you can." read more.
So they went made the tomb secure, by sealing the stone, in presence of the guard.