'What do you say about pouring a libation to some god from this cup? Is it allowed or not?' 'We only prepare just the right amount to drink, Socrates,' he [the jailer] said. 'I understand,' he went on; 'but it is allowed and necessary to pray to the gods, that my moving from hence to there may be blessed; thus I pray, and so be it.'
Plato Phaedo 117b