Waste not, want not.
What is done cannot be undone.
When children stand quiet, they have done some harm.
When wine is in wit is out.
Wise after the event.
You cannot flay the same ox twice.
You can't take it with you.
We know not what is good until we have lost it.
What is got over the devil's back is spent under his belly.
When flatterers meet, the devil goes to dinner.
Where there's a will there's a way.
Wise men think alike.
You cannot judge a tree by it bark.
You can't teach an old dog new tricks.
We never know the value of water till the well is dry.
What is lost is lost.
When in Rome, do as the Romans do.
Where there's muck there's brass.
With time and patience the leaf of the mulberry becomes satin.
You cannot teach old dogs new tricks.
You can't tell a book by its cover.
We shall see what we shall see.
What is sauce for the goose is sauce for the gander.
When it rains, it pours.
Where there's smoke, there's fire.