Meaning of the word "speak of the devil, and he shall appear" in English

What does "speak of the devil, and he shall appear" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

speak of the devil, and he shall appear

US /spiːk əv ðə ˈdev.əl ənd hiː ʃæl əˈpɪr/
UK /spiːk əv ðə ˈdev.əl ənd hiː ʃæl əˈpɪə/
"speak of the devil, and he shall appear" picture

Idiom

said when a person appears just after being mentioned

Example:
We were just talking about John when he walked in. Speak of the devil, and he shall appear!
Speak of the devil, and he shall appear; I was just about to call you.