I knew I heard Spock say that. It was that episode when Kirk fought the lizard dude w/the diamond eye-balls and then Kirk makes a cannon out of bamboo, coal, dirt and whatever the hell else he could find. Spock says, "I bet the lizard dude kicks Jim's ass". Shortly afterward, Kirk clocks him with that cannon. Spock says, "to hell with it, fade me and prosper".
It was one of my favorite episodes.
nole