fixer des limites

listen to the pronunciation of fixer des limites
الفرنسية - الإنجليزية
draw the line
To set a boundary, rule, or limit, especially on what one will tolerate

I don't mind if they have some fun, but I draw the line at anything that might harm others.

set a limit, fix a boundary, decide what is acceptable and what is not
reasonably object (to) or set a limit (on); "I draw the line when it comes to lending money to friends!