Psalms 6:2

“Have mercy upon me, O Lord, etc.] He knew he was a sinner, both by original sin and actual transgression, which he was always ready to own; he knew that what he had done deserved the wrath of God, even his hot displeasure; and that for such things it came upon the children of disobedience: he knew that there was mercy with God through Christ, and therefore he flees unto it, pleads for it, and entreats the manifestation of forgiving love: he pleads no merits of his own, nor makes any mention of former works of righteousness done by him, but throws himself upon the mercy of God in Christ; giving this as a reason, for I [am] weak; either in body, through some disease upon him; or in soul, being…”

“I am weak--as a culled plant (Isa 24:4). my bones--the very frame. are vexed-- (Psa 2:5) --shaken with fear.”

“Have mercy upon me, O Lord - That is, be gracious to me; or, show me compassion. This language may be used either in view of sin, of suffering, or of danger. It is a cry to God to interpose, and remove some present source of trouble, and may be employed by one who feels that he is a sinner, or by one on a bed of pain, or by one surrounded by enemies, or by one at the point of death, or by one who is looking out with apprehension upon the eternal world. It is commonly, indeed (compare Psalms 51:1), a cry to God in view of sin, pleading for pardon and salvation; but here it is a cry in view of trouble and danger, outward sorrow and mental anguish, that had overcome the strength of the sufferer…”

“Bones - My inmost parts. Psalms 6:5”

“6:2-3 In his longing for God’s response to his prayer, the psalmist grew physically weak (6:6; see 77:3; 119:81; 142:1-3; see also Ps 101). Fasting might have played a part in his agony, but this is not mentioned.”

“for I: Psa 38:7, Psa 41:3, Psa 103:13-17 heal: Psa 30:2; Gen 20:17; Exo 15:26; Num 12:13; Deu 32:39; Job 5:18; Jer 17:14; Hos 6:1; Mat 4:24 my: Psa 32:3, Psa 38:3, Psa 51:8; Job 19:21, Job 33:19-21 Psalms 6:3”