S5E1 - Homer’s Barbershop Quartet.
Lisa finds the B-sharps album at the swap meet and shows it to Bart, who asks when Homer recorded an album. Homer’s surprised that Bart doesn’t remember since it was only 8 years ago. Bart says that, thanks to TV, he can’t remember what happened 8 minutes ago.
Hens love roosters, geese love ganders, and everyone else loves Ned Flanders!
S4E19 “The Front”
The episode itself is where Bart and Lisa use Grampa’s name to submit their own Itchy and Scratchy episode and Homer studies to pass a test so he can finally get his high school diploma.
This scene is from the after credits “Adventures of Ned Flanders” where Ned asks his sons why they aren’t going to church. They reply that it’s because it’s Saturday.