The heaviest load [is] on the gentlest horse.
Note: This proverb, like many, is equivocal. It could be interpreted in two different ways. On the one hand, it could be used as a indicator of a good worker. She doesn’t complain. She gets the job done. Is fearr obair ná caint.
On the other hand, this could also mean that unless one speaks up one is likely to be exploited. Like the horse in George Orwell’s “Animal Farm”, he can passively accept more and more work until his health fails him. He needs to know when to say no. He can not do everything. Ní féidir leis an ngobadán an dá thrá a fhreastal.