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The composer wrote the piece after experiencing the death of his child.
Mark, Psalm 22:
The substructure for the crucifixion in chapter 15 is, as all recognize, Psalm 22, from which derive all the major details, including the implicit piercing of hands and feet (Mark 24//Psalm 22:16b), the dividing of his garments and casting lots for them (Mark 15:24//Psalm 22:18), the “wagging heads” of the mockers (Mark 15:20//Psalm 22:7), and of course the cry of dereliction, “My God, my God, why have you forsaken me?” (Mark 15:34//Psalm 22:1).
The Septuagint, a Jewish translation of the Hebrew Bible into Koine Greek made before the Common Era, has ωρυξαν χειράς μου και πόδας (“they have dug my hands and feet”), which Christian commentators argue could be understood in the general sense as “pierced”.