Prayers to deliver souls from purgatory

In the Communion of Saints, purgatory represents the suffering Church. The souls waiting for heaven are in a state of atonement for their sins, which can be more or less long. It depends on the prayers, Masses, and offerings made by the militant and suffering Church on earth in favor of the souls in purgatory.
Prayers from the Bible, the saints or Christian writers to help us better pray to deliver these suffering souls and allow them to enjoy the glory of the Holy Trinity.