Psalm 109 (Greek numbering, Psalm 108) is a psalm noted for containing some of the most frighteningly severe curses in the Bible, such as:
Let there be none to extend mercy unto him: neither let there be any to favour his fatherless children.
Let his posterity be cut off; and in the generation following let their name be blotted out.
It has traditionally been called the "Judas psalm."
Psalm 109 was used by Thomas Hardy in his novel The Mayor of Casterbridge. Michael Henchard, the protagonist of the novel, is drinking with the choir after practice when he sees his rival, Donald Farfrae, whom he hates. He later persuades the choir to sing Psalm 109. The choir master remarks of this psalm that, "Twasn’t made for singing. We chose it once when the gypsy stole the parson’s mare, thinking to please him, but parson were quite upset. Whatever Servant David were thinking about when he made a Psalm that nobody can sing without disgracing himself, I can’t fathom."