Meaning of the word "never test the depth of river with both feet" in English

What does "never test the depth of river with both feet" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

never test the depth of river with both feet

US /ˈnɛvər tɛst ðə dɛpθ ʌv ˈrɪvər wɪð boʊθ fit/
UK /ˈnɛvə tɛst ðə dɛpθ ɒv ˈrɪvə wɪð bəʊθ fiːt/
"never test the depth of river with both feet" picture

Idiom

do not jump into a situation without thinking about the consequences or risks; avoid being reckless

Example:
You shouldn't invest all your savings in one stock; never test the depth of river with both feet.
He quit his job before finding a new one, forgetting the advice to never test the depth of river with both feet.