"Badges! We don' need no steenking badges!" was from the "Treasure of Sierra Madre" Not technically a "Western" but on eof my favorite moves of all time.

My favorite line from a western is more current.

Doc Holiday to Wyatt Erp in Tombstone. "Wyatt, I stand corrected, You are an Oak."

Follow closely by "I'll be your huckleberry." Holiday again, same movie.