Jesus died as a human and his body was put in a tomb by Joseph of Arimathea (Matthew 27:57-60). Jesus prepared his apostles for the fact that he would die and no longer be physically with them in Matthew 16:21 “…He explained to his disciples that he must be killed and on the third day, raised to life.” Other scriptures support the fact that he died and was laid in a tomb for three or parts of three days. Luke 9:22, Matthew 27:63,64 and Mark 8:31
The word “grave” (and the various other versions of it) is the Hebrew word sheol and is the state or a condition of death or oblivion– not hell as understood by many to be a place of torment where evil people go. Sheol and its Greek equivalent, “Hades,” is a condition of and it is referred to as the sleep of death in Matthew 9:24 and John 11:11. Ecclesiastes 9:5 supports the state of nothingness – “the dead know not anything." Every human who dies goes to the grave/sheol, or hades as did Jesus who was in this condition for parts of three days until his resurrection, Luke 24:46.
Some people are confused as to the meaning of 1 Peter 3:18,19, “Because Christ also suffered for sins once…being put to death in the flesh, but quickened in the spirit; in which also he went and preached unto the spirits in prison.” The concept of quickening refers to becoming spirit-begotten by God when we receive salvation. This energizing of the new life occurs in us while we are still in the flesh. Ephesians 2:1, “And you hath he quickened, who were dead in trespasses and sins”.
If Jesus’ quickening occurred at Jordan, when was he “put to death in the flesh”?When our Lord was baptized in the river, God considered his flesh dead. In the same way, believers are considered dead at our spirit begettal. Colossians 2:12, “Buried with him in baptism, wherein also ye are risen with him through the faith of the operation of God…” When Jesus was raised from the water and received the Holy Spirit at Jordan, he was quickened with a new life to serve God. It was the witness of his sacrificial life for 3 1/2 years that preached unto the fallen angels in the prison of Tartarus.