Psalms 41:10

“But thou, O Lord, be merciful unto me, and raise me up, etc.] Not from a bed of illness, nor from a state of poverty and want; but from the dead: it was by the will of his divine Father that he suffered death, and it was to him he made satisfaction and reconciliation for the sins of his people, by his sufferings and death; and therefore it was but a reasonable request, that, having done this, he should be raised from the dead: besides, his Father had promised it, and he had believed it; so that this prayer was a prayer of faith, founded upon a divine promise; and the resurrection of Christ is for the most part ascribed to God the Father as his act; though not to the exclusion of the Son, who…”

“A lawful punishment of criminals is not revenge, nor inconsistent with their final good (compare Psa 40:14-15).”

“But thou, O Lord, be merciful unto me - That is, give me strength; restore me from my sickness and weakness. And raise me up - From my bed of languishing. That I may requite them - That I may repay them; or may recompense them. The word used here - שׁלם shālam - means properly, to be whole, sound, safe; then, in Piel, to make secure, or preserve in safety; and then, to complete, to make whole, to make good, to restore; and then, to make whole or to complete in the sense of recompensing or requiting: to make the matter equal. It would be well expressed here by the familiar language, “giving them what they deserve.” But it is not necessary to understand this as indicating an unforgiving…”

“Requite - Punish them for their wicked practices; which being now a magistrate, he was obliged to do. Psalms 41:11”

“be merciful: Psa 57:1, Psa 109:21 that: Psa 18:37-42, Psa 21:8-10, Psa 69:22-28, Psa 109:6-20; Luk 19:27 Psalms 41:11”

“(Heb.: 41:11-13) Having now described their behaviour towards him, sick in soul and body as he is, so devoid of affection, yea, so malignantly hostile and so totally contrary to the will and promise of God, David prays that God would raise him up, for he is now lying low, sick in soul and in body. The prayer is followed, as in Ps 39:14 and many other passages, by the future with ah: that I may be able to requite them, or: then will I requite them. What is meant is the requiting which it was David's duty as a duly constituted king to exercise, and which he did really execute by the power of God, when he subdued the rebellion of Absalom and maintained his ground in opposition to faithlessness…”