Chinese Proverb: Cackling Hens Do not Lay Eggs

To understand a proverb is not easy.

In Asian culture, oral traditions are kept alive by proverbs that throw light on our cultural values and perspectives, along with a dash of history. In Kerala, there are so many interesting proverbs that the elders quote but it also has layers of meanings that one needs to delve into.

I've found it interesting to think about proverbs because they are similar to legal maxims. read this Chinese proverb, "Cackling hens do not lay eggs," I liked it instantly. Another one is "Cats who like to mew can't catch mice." Both mean that boastful people do not really do what they claim or say.

What is the proverb that comes to your mind? What does it mean?