When Pyrrhus learned of it, he kept quiet for a time, but on a day of sacrifice invited Neoptolemus to supper and killed him.
Edition :
Plutarch Lives IX: Demetrius and Antony, Pyrrhus and Caius Marius, Ed. Jeffrey Henderson, trans. Bernadotte Perrin (The Loeb Classical Library 101), Harvard University Press: Cambridge/MA - London 1968 (first ed. 1920).
Notes :
Concerning the context: It is entertainig because Neoptolemus was invited to supper. The conspiracy is described in more detail in the paragraphs 5.2-5-5.