“And the graves were opened; and many bodies of the saints which slept arose,”
King James Version (KJV)
27:52 Some of the tombs were shattered and laid open by the earthquake, and while they continued unclosed (and they must have stood open all the Sabbath, seeing the law would not allow any attempt to close them) many bodies of holy men were raised, (perhaps Simeon, Zacharias, John the Baptist, and others who had believed in Christ, and were known to many in Jerusalem,) And coming out of the tombs after his resurrection, went into the holy city (Jerusalem) and appeared to many - Who had probably known them before: God hereby signifying, that Christ had conquered death, and would raise all his saints in due season.
Mt 27:52 The graves were opened. The convulsions of the earth would naturally roll the stones from the doors of the sepulchers. The saints which slept arose. Who is not stated, or whether their bodies returned to the grave again. Their rising was a testimony that the death of Christ is life to the saints.