for heaven's sake
Um Himmels Willen, wie kommst du denn darauf?
For heaven's sake, how did you come up with that?
— Rebecca (1940)
Um Himmels Willen!
For heaven's sake!
— Aguirre, der Zorn Gottes (1972)
Um Himmels Willen.
Good heavens.
— Die Braut des Prinzen (1987)
Was um Himmels Willen kann das sein?
What on earth could that be?