Radak, on Ps 21:21

“Deliver, O God, my soul from the sword: my only one from the hand of the dog.”

“Deliver my soul from the sword; – from the sword of exile, lest I be exterminated in exile: My only one from the power of the dog: – Dog, lion, and wild oxen are figurative for the kings of the nations of the world among whom we are in exile. And he describes each one in accordance with its importance (greatness). My only one is the spirit which is solitary dwelling in houses of clay, and there is nothing else like it; for the lustful soul (נפט) is the body.”

Imported from an open dataset — not yet checked against the printed edition.