John Chrysostom — as excerpted in the Catena Aurea on Matthew 27:62-66

“Pilate will not suffer that the soldiers alone should seal. But as though he had learnt the truth concerning Christ, he was no longer willing to be partner in their acts, and says, Seal it as ye will yourselves, that ye may not be able to accuse others. For had the soldiers alone sealed, they might have said that the soldiers had suffered the disciples to steal the body, and so given the disciples a handle to forge a tale concerning the resurrection; but this could they not say now, when they themselves had sealed the sepulchre.”