Don’t sweat it!

don't sweat it

Don't worry or stress about it. A: "I promise I'll pay you back the next time I see you." "B: "Oh, it's just a few bucks, don't sweat it!"
See also: sweat
Farlex Dictionary of Idioms.

Don’t sweat it!

exclam. Don’t worry about it! Don’t sweat it! We’ll take care of it.
See also: sweat
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • come Monday
  • don't get me wrong
  • cast (one's) lot in with (someone or something)
  • cast lot in
  • all in (one's) head
  • discipline
  • discipline (one) for (something)
  • discipline for
  • don't beat a dead horse
  • don't bet on it