I fear I cannot sit the nag home." "Hillsboro People", - Dorothy Canfield

But it will nag at them because they know this effect can't possibly exist. "Toy Shop", - Henry Maxwell Dempsey

So now when she wanted to mount her horse again, the one that was called Falada, the waiting- maid said, " Falada is more suitable for me, and my nag will do for thee" and the princess had to be content with that. "Household Tales by Brothers Grimm", - Grimm Brothers

" In case you arrive at whatsoever point you have decided upon, in safety, it will be well for one to procure a horse and rush on in advance, otherwise you may arrive too late-" " We can trust our legs for getting us there as quickly as any farmer's nag could carry us," Archie interrupted with a laugh, and I was puffed up with pride when the doctor gave the paper into my keeping as he said gravely: " It would work ill to the Cause if this was read by our enemies, therefore it must be destroyed in case you are like to be taken by any of the king's mercenaries." "The Minute Boys of Boston", - James Otis