The soldiers are bribed to lie.

While the women were returning to the disciples, the soldiers who had been guarding the tomb reported what had happened to the chief priests. The priests met with the elders to decide what to do. They gave the soldiers a lot of money and told them “Say ‘His disciples stole his body while we were sleeping.’ If Pilate hears about this we will handle it and cover for you.” The soldiers took the bribe and did as they were told. This story has been repeated among the Jews to this very day.

MT 28:11-15