E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
A Jewish party which denied the existence of spirits and angels, and, of course, disbelieved in the resurrection of the dead; so called from Sadoc (righteous man), thought to be the name of a priest or rabbi some three centuries before the birth of Christ. As they did not believe in future punishments, they punished offences with the utmost severity.