What does the Bible say about what Jesus finished on the cross?

According to John 19:30, when Jesus declared, 'It is finished,' He was affirming that He had completed the work given to Him by the Father, which was the task of redemption. This work encompassed the entire will of God and included the fulfillment of perfect righteousness that was necessary for the salvation of His people. Jesus' sacrifice was accepted by God because it met the standard of perfection required for sin atonement. This fulfillment means that God's holy justice was satisfied, and believers can now stand justified before Him, their sins blotted out forever as stated in Isaiah 43:25.