"[Singing to Harleen in a fantasy musical theatre production, kneeling on stage clutching abdomen] When... when I build that mountain, as I will someday, and the Lord sends Gabriel to take me away, I want a fine son to take my place, [scene cuts to prison hallway with his attacker watching while laughing] I'll leave a son in my heaven on Earth. With the good Lord's... [Arthur falls against wall] ...grace."
January 1, 1970
https://en.wikiquote.org/wiki/Joker%3A_Folie_%C3%A0_Deux