What is the source for the quote by Anton Chekhov "We shall find peace, we shall hear angels..."?What story/book was it in and where can I find the...

The complete quote reads:

"We shall find peace. We shall hear angels. We shall see the sky sparkling with diamonds."

The source is the play "Uncle Vanya"

I read that a variation of this quote is also found as:

"We shall rest. We shall hear the angels. We shall see heaven shining like a jewel."