The Passover lamb was slaughtered before the blood could be put on the doorpost. The blood on the doorpost was the salvation for the Children of Israel. So the Eternal Sacrifice had to be presented before His blood could cover our sin. This meant that the nails of betrayal, denial, and desertion had to be put into place before the resurrection could be effective. Man cannot kill God. Jesus was wholly man and wholly God. But God had to leave before the cross; and, He had to return after the cross. Witness the death and resurrection of the Holy and wholly.