for one's sake

[for one's sake] {adv. phr.}, {informal} Used with differentpossessive nouns to show surprise, crossness, or impatience.

Forheaven's sake, where did you come from?

For Pete's sake, lookwho's here!

Well, for pity's sake, I wish you'd told me sooner.

Oh, for gosh sake, let me do it.