CCC 626 Since the “Author of life” who was killed¹ is the same “living one [who has] risen”,² the divine person of the Son of God necessarily continued to possess his human soul and body, separated from each other by death:
By the fact that at Christ’s death his soul was separated from his flesh, his one person is not itself divided into two persons; for the human body and soul of Christ have existed in the same way from the beginning of his earthly existence, in the divine person of the Word; and in death, although separated from each other, both remained with one and the same person of the Word.³

1 Acts 3:15.
2 Lk 24:5-6.
3 St. John Damascene, De fide orth. 3, 27: PG 94, 1097.