The Trinity is one God but three distinct
persons.
Jesus quoted Psalm 22 which is often called “The Prayer of an Innocent Person.”
My God, my God, why have you abandoned me?
Why so far from my call for help,
from my cries of anguish?
My God, I call by day, but you do not answer;
by night, but I have no relief
(Pslam 22:2-3)
The Jews who stood by would have recognized his words as coming from the Psalm. They would have also recognized that it was a Psalm of deliverance, of victory, and above all, a Psalm of trust.
**
For he has not spurned or disdained
the misery of this poor wretch,
Did not turn away from me,
but heard me when I cried out.
All the ends of the earth
will remember and turn to the LORD;
All the families of nations
will bow low before him
And I will live for the LORD;
my descendants will serve you***
(Psalm 22:25,28,31)
God the Son was praying Psalm 22 to God the Father as he died. It is
worth reading in that light.
-Tim-