After analyzing a patent royalty dispute over a Spider-Man toy, Supreme Court Justice Elena Kagan concluded her majority opinion in 2015’s Kimble v. Marvel Entertainment with an unusual citation. Rather than reference a prior case or statute, Kagan paid homage to the 1962 work in which Marvel Comics founder Stan Lee, along with collaborator Steve Ditko, first introduced the teen-turned-genetically altered superhero to the public.

“In this world, with great power there must also come—great responsibility,” Kagan wrote, citing a Spider-Man quote that has been making the rounds in social media circles this week, after news broke on Monday that Lee had died at age 95.