A lean dog gets nothing but fleas

Similar English and Irish sayings:

Dog that is idle barks at his fleas, but he that is hunting feels them not Dog that is idle barks at his fleas, but he that is hunting feels them not
He who lies down with dogs will rise with fleas He who lies down with dogs will rise with fleas
He that lies down with dogs must rise up with fleas He that lies down with dogs must rise up with fleas

Proverbs and English sayings