John 19:28
“After this, Jesus knowing that all things were now accomplished.”
That is, “that nothing was wanting to the Dispensation.” For He was everywhere desirous to show, that this Death was of a new kind, if indeed the whole lay in the power of the Person dying, and death came not on the Body before He willed it; and He willed it after He had fulfilled all things. Therefore also He said, “I have power to lay down My life; and I have power to take it again.” Knowing therefore that all things were fulfilled, He says,
Source: Homilies on the Gospel of John (New Advent)