The Christian Bible teaches that reincarnation does exist. God himself preexisted and entered into the body of Jesus. The Christian Bible teaches that God’s son appears on the earth three times, twice as the son of man. Is that not talking about reincarnation?
You may be confused. There are no New Testament texts that speak of God entering into the body of Jesus. Rather, we are told in texts like Philippians 2:6-11 that the pre-existent Son of God, the second person of the Trinity, took on flesh–flesh which was created in Mary’s womb by means of the miracle of the virginal conception (see Luke 2). Neither does the Old Testament or the New Testament teach that God’s Son appears on earth three times. Rather, we are told that Jesus appeared for the one and only time during the reign of Herod the Great–though, to be sure, texts like Mark 14:62 indicate that he will return at the time of the final resurrection and last judgment.
—Ben Witherington III