1001 Arabian Nights

In Portuguese there is a current expression in these terms: "Deixe os patos passar". It means word by word: Let the ducks go by or pass along.

This is an ironical expression, whereby someone suggests that something will happen but certainly in a time that will never really come. The origin is probably from a fable in which a king promises to release a young man from death if he is able to tell him a never-ending story. And the astute young man tells a tale of ducks passing along in a stream. One duck follows the other, and the ducks never stop coming. So the story never reaches the end. Waiting for all the ducks to pass means waiting for ever.

Any equivalent in English?

Jose Carlos

Til the cows come home?

Would the literary equivalent be the Arabian Nights?