Final answer:
The Gospels of Matthew, Mark, Luke, and John in the New Testament of the Bible are the writings that detail God's eternal plan of salvation revealing Jesus Christ's life, death and resurrection as a divine fulfillment for human redemption.
Step-by-step explanation:
The writings in which God's eternal plan of salvation is revealed are known as the Gospels, which consist of the books of Matthew, Mark, Luke, and John in the New Testament of the Bible. Jesus' coming, his death, and his resurrection are central to Christian belief, and these events are seen as fulfillment of God's promise for humanity's redemption. The Gospels record the life, teachings, crucifixion, and resurrection of Jesus Christ, conveying the core of Christian theology that Jesus is the Messiah, the anointed one, sent to provide salvation for humanity.
Within Christianity, it's believed that Jesus's death and resurrection were predestined parts of a divine plan that offer eternal life and forgiveness for human beings. Notably, his death on the cross is seen as a sacrifice that paves the way for the redemption of mankind from sin. The sacred text where this divine plan is documented, the Bible, serves as the foundational text for Christian teachings and is a testament to Jesus' role as the prophesied savior.