Psalms 41:4

² The LORD will protect and preserve him; He will bless him in the land and refuse to surrender him to the will of his foes.

³ The LORD will sustain him on his bed of illness and restore him from his bed of sickness.

I said, “O LORD, be gracious to me; heal me, for I have sinned against You.”

⁵ My enemies say with malice: “When will he die and be forgotten?”

⁶ My visitor speaks falsehood; he gathers slander in his heart; he goes out and spreads it abroad.

Do read the surrounding verses too, because the context often says more than a single verse.

Compare

BSB: I said, “O LORD, be gracious to me; heal me, for I have sinned against You.”
KJV: I said, LORD, be merciful unto me: heal my soul; for I have sinned against thee.
WEB: I said, “LORD, have mercy on me! Heal me, for I have sinned against you.”
ASV: I said, O Jehovah, have mercy upon me: Heal my soul; for I have sinned against thee.
DARBY: As for me, I said, Jehovah, be gracious unto me: heal my soul; for I have sinned against thee.
BLB: I said, “O YHWH, be gracious to me; heal my soul, for I have sinned against You.”

ÅB: Jeg sier: «Herre, vær nådig mot meg, helbred sjelen min!
for jeg har syndet mot deg.»
OTB: Men jeg sa: "Herre, vis nåde mot meg;
Helbred min sjel, for jeg har syndet mot Deg."
B1930: Jeg sier: Herre, vær mig nådig, helbred min sjel! for jeg har syndet imot dig.

Psalms 103:3
He who forgives all your iniquities and heals all your diseases,
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James 5:15–16
And the prayer offered in faith will restore the one who is sick. The Lord will raise him up. If he has sinned, he will be forgiven.
Read in context
Hosea 6:1
Come, let us return to the LORD. For He has torn us to pieces, but He will heal us; He has wounded us, but He will bind up our wounds.
Read in context
2 Chronicles 30:18–20
A large number of the people—many from Ephraim, Manasseh, Issachar, and Zebulun—had not purified themselves, yet they ate the Passover, contrary to what was written. But Hezekiah interceded for them, saying, “May the LORD, who is good, provide atonement for everyone
Read in context
Psalms 147:3
He heals the brokenhearted and binds up their wounds.
Read in context
Psalms 6:2–4
Be merciful to me, O LORD, for I am frail; heal me, O LORD, for my bones are in agony.
Read in context
Psalms 32:5
Then I acknowledged my sin to You and did not hide my iniquity. I said, “I will confess my transgressions to the LORD,” and You forgave the guilt of my sin. Selah
Read in context
Psalms 51:1–4
Have mercy on me, O God, according to Your loving devotion; according to Your great compassion, blot out my transgressions.
Read in context