ANSWER: It is in order to say that many of the saints were resurrected from the dead at that time. (Of course, this is not to be confused with the general resurrection of the dead at the end of time in which “all” of the dead will be raised.) The Bible does not tell us the names of these or who they were, other than the fact that they were saved people or “saints.” Upon their resurrection they went into the city of Jerusalem and appeared to many. Though the purpose of their appearance is not given, it seems reasonable to assume that it was done to convince the Jews of the power and divinity of Christ.