Translation of "adage" into Danish

I also know that sometimes, the old adage is true.

Men de gamle ordsprog taler somme tider sandt.

Proves the adage that wisdom can be found in the most unlikely places.

Det beviser det mundheld, at visdom findes de mest usandsynlige steder.

You've heard the old adage, a cracked mirror brings seven years bad luck.

Du har vel hørt talemåden om, at et knust spejl bringer syv års uheld.