mark my words

Translations
запомни (мои) слова
Mark my words, he will regret this decision.
Запомни мои слова, он пожалеет об этом решении.
Definitions
A phrase used to emphasize that what the speaker is saying is important and should be remembered because it will likely prove to be true in the future.
Words
word

noun
слово
mark

verb
отмечать