Purgatory is the place and state in which souls suffer for a while and are purged after death, before they go to heaven, on account of their sins. It is of faith that those in purgatory can be helped by the prayers and sacrifices of the faithful on earth and especially by the acceptable Sacrifice of the altar. The existence of purgatory is universally taught by all the Fathers of the Church. Even in the Old Testament there was belief in the existence of purgatory, for there we find Judas Machabeus sending 12,000 drachmas to Jerusalem to have sacrifices offered for the sins of the dead. The chapter ends with the advice: "It is therefore a holy and wholesome thought to pray for the dead, that they may be loosed from sins" (Mach. 12:46). ... https://www.youtube.com/watch?v=NmiOuwboyyo