Isaiah 26 expresses hope in God's final deliverance and includes a striking expectation that the dead will live and rise.
The fulfillment passages listed here (Matt 27:50-54) illuminate the Christian application summarized as "His power of Resurrection predicted." The correspondence is meaningful within the New Testament portrait of Jesus, but where the New Testament does not explicitly quote this exact Isaiah verse as fulfilled, it is best described as a theological or messianic correspondence rather than claiming more precision than the biblical writers themselves state.