That which survives when its companions are dead. (Latin, supersto.) Those who escaped in battle were called superstites.
Superstition is religious credulity, or that religion which remains when real religion is dead.
Paul said to the Athenians that he perceived they were “too superstitious.” - Acts x v. 22. Supped all his Porridge (He has). Eaten his last meal; he is dead.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894