Fill in the blank

[Manwe Sulimo]

Hey, Meela! We're still on

Frodo: "Pity Bilbo didn't kill him when he had the chance"
Gandalf: "Pity? It was ________ that stayed Bilbo's hand."

My new quote:

"...lust that stayed Bilbo's hand! Bilbo always had a thing for deformed hobbits, and now he had one right where he wanted him! In the dark caverns of the Misty Mountains, away from anywhere else....he only thought that Gollum wanted to 'nibble.' Alas, he found his new toy ring to be too fun to play with. Otherwise, he would still be there, in Gollum's cave...."