From the Lenten Triodion:
Great and Holy Saturday

Hell rules the race of mortal men, but not eternally; for when You were placed in the grave, O powerful One,You tore asunder the bars of death by Your life-creating hand and proclaimed true deliverance to those sleeping there from the ages, since You, Savior, have become the first-born of the dead, Glory to You!

(Troparia of Six Ode Matins Canon of Holy Saturday)

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