Định Nghĩa và Ý Nghĩa của "speak too soon"

What is the origin of the idiom "speak too soon" and when to use it?

The idiom "speak too soon" originated from the idea of prematurely expressing an opinion or making a confident statement before all the relevant information or events have unfolded. It is used to suggests that the speaker's statement may be invalidated or proven wrong by subsequent developments.