With a cry of hatred that stung the very ears like venom he let fall his mace.
Whether because Frodo was so worn by his long pains, wound of knife, and venomous sting, and sorrow, fear, and homeless wandering, or because some gift of final strength was given to him, Sam lifted Frodo with no more difficulty than if he were carrying a hobbit-child pig-a-back in some romp on the lawns or hayfields of the Shire.
There are no more uses of "venom" in the book.
Show samples from other sources
It was a cobra, whose venom could kill a person in minutes.
Paulo Coelho -- The Alchemist
I used elder python venom, straight from the depths of Tartarus.