Gullivers Travels by Part 1 Chapter 6 Page 10

Ingratitude is among them a capital crime, as we read it to have been in some other countries: for they reason thus; that whoever makes ill returns to his benefactor, must needs be a common enemy to the rest of mankind, from whom he has received no obligation, and therefore such a man is not fit to live.

Their notions relating to the duties of parents and children differ extremely from ours. For, since the conjunction of male and female is founded upon the great law of nature, in order to propagate and continue the species, the Lilliputians will needs have it, that men and women are joined together, like other animals, by the motives of concupiscence; and that their tenderness towards their young proceeds from the like natural principle: for which reason they will never allow that a child is under any obligation to his