When Jesus died and they put his body in the tomb it only looks like He is taking a Sabbath rest. But He was:
In the grave with the body, in Hades with soul as God, in paradise with the thief, on the throne with the Father and the Spirit was thou Oh Christ filling all things, thyself uncircumscribed.
On Saturday He was destroying death by death.
On Saturday, the high priests and Pharisees gathered together before Pilate and asked him to have Jesus’ tomb sealed until the third day; because, as those enemies of God said, “We suspect that His disciples will come and steal His buried body by night, and then proclaim to the people that His resurrection is true, as that deceiver Himself foretold while He was yet alive; and then the last deception shall be worse than the first.” After they had said these things to Pilate and received his permission, they went and sealed the tomb, and assigned a watch for security, that is, guards from among the soldiers under the supervision of the high priests (Matt. 27:62-66). While commemorating the entombment of the holy Body of our Lord today, we also celebrate His dread descent with His soul, whereby He destroyed the gates and bars of Hades, and made His light to shine where only darkness had reigned (Job 3 8 : 17; Esaias 49:9; 1 Peter 3:18-20); death was put to death, Hades was stripped of all its captives, our first parents and all the righteous who died from the beginning of time ran to Him Whom they had awaited, and the holy angelic orders glorified God for the restoration of our fallen race.
Lowering Your pure body from the Cross, Joseph wrapped it in clean muslin with fragrant spices and laid it in a new tomb. Apolytikion
He Who enclosed the deeps is now seen dead; and the immortal One is laid in a tomb enclosed in a shroud with myrrh. Women, too, come to anoint Him, weeping bitterly and lamenting: “This Sabbath is blessed above all others, for Christ, having fallen asleep, will rise on the third day.” Kontakion