deus meus, deus meus, ad quid me maledixisti
.. is a curious combination of Psalm 22:
My God, my God, why do you abandon me?
...and Deuteronomy 22:23
Cursed by God is the crucified one
It is exactly in conformity with the doctrine of Paul who teaches:
"Christ has redeemed us from the curse of the Law by becoming a cursed object for us, because it is written: Cursed is he who hangs from the wood"
(Gal. 3:13).
Jesus, hanging on wood, is expressly cursed by God.