Kol Yisrael
Besides meaning "voice of Israel", "Kol Yisrael" is also a wordplay which in Hebrew sounds like the phrase "all of Israel" (although spelled differently), known to many Jews as part of the Talmudic expression, "כל ישראל ערבים זה בזה" ("kol Yisra'el arevim ze baze", roughly translated, "all of Israel are responsible for one another").