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Please?
So then what "all things" did Jesus finish before John 19:28?, . . . Jesus knowing that all things were now accomplished, . . . ?
The “all things / everything” in John 28 refers to the things were prophesied in scripture concerning the mission of Jesus.
The final event was to die. It was His death that paid for the sins of the world.
28 Later, knowing that everything had now been finished, and so that Scripture would be fulfilled, Jesus said, “I am thirsty.” 29 A jar of wine vinegar was there, so they soaked a sponge in it, put the sponge on a stalk of the hyssop plant, and lifted it to Jesus’ lips. 30 When he had received the drink, Jesus said, “It is finished.” With that, he bowed his head and gave up his spirit.
Matthew 20:28
Even as the Son of man came not to be ministered unto, but to minister, and to give his life a ransom for many.