As good be an addled egg as an idle bird.
What is past and cannot be prevented should not be grieved for.
When the cat's away, it is jubilee with the mice.
When they came to shoe the horse of the sultan, along comes the beetle and sticks out her foot.
Sweep before your own door before you sweep before others.
Tread on a Worm and she will stir her tail.
Its no use going to the goat's house to look for wool.