LORELAI: Well, here’s hoping your cat exposes itself to you soon.
KIRK: From your mouth to God’s ears.
From your mouth to God’s ears is an idiomatic Yiddish saying, indicating that the speaker wishes whatever has been to come true. Although similar such proverbs can be found in the Bible, the expression only seems to exist in Jewish/Yiddish literature from the middle of the 19th century. The saying is also common in Arabic, and this is possibly its origin.
The Annotated Gilmore Girls 