Raise nae mair deils than ye are able to lay.
"Raise no more spirits than you can conjure down."—German.
Rather spoil your joke than tine your friend.
Raw dads mak fat lads.
Raw leather raxes weel.
"Raw leather will stretch."—English.
Reavers shouldna be ruers.
Literally, robbers should not repent.
Reckless youth maks ruefu' eild.
"People who live too fast when they are young will neither have a vigorous nor a comfortable old age."—Kelly.