spare the rod and spoil the childused to say that if you are not strict enough with your child in childhood they are bound to have problems when they grow up
Spare the rod and spoil the child are true words of wisdom.
Submitted by Boris Marchenko from Russian Federation on 26/07/2017
From our crowdsourced Open Dictionary
4
make rod for your own backused to say that something you are doing will be to your disadvantage later on
If you try to do everything from scratch yourself you are making a rod for your own back.