The next day was the day after Preparation Day. The chief priests and the Pharisees went to Pilate.
"Sir," they said, "we remember something that liar said while he was still alive. He claimed, 'After three days I will rise again.'
So give the order to make the tomb secure until the third day. If you don't, his disciples might come and steal the body. Then they will tell the people that Jesus has been raised from the dead. This last lie will be worse than the first."
"Take some guards with you," Pilate answered. "Go. Make the tomb as secure as you can."
So they went and made the tomb secure. They put a seal on the stone and placed some guards on duty.