There are a fair few of memes from the Simpsons that actually come from “later” episodes, e.g.

• Wow, The Fortune Cookies Here Really Are More Accurate (S16E12)
• I gotta tell you. This is pretty terrific. (S13E07)
• Damn Scots, they ruined Scotland! (S15E12)
• Moe throwing Barney out and him coming back (S17E13)
• Ralph Wiggum dives through window (S14E21)
• Homer hides his fat in his back (S19E7)
• etc etc