Jeremiah 15:6: I am weary with repenting

Dreadful soul-o'erwhelming word!
Have we wearied out the Lord?
Can the God of mercy be
Weary of forgiving me?
Are His last compassions spent.
Will He never more repent,
Never more my sins pass by,
Leave me to sin on, and die?

Justly may'st Thou give me up
Dying without peace or hope.
Righteous is my God, if Thou
Finally forsake me now:
But if He, the sinners' Friend,
He, whose mercies never end.
Prays that I may turn and live.
Father, Thou must still forgive!