[If] the fourteenth [of Nissan] falls on the Sabbath, we remove everything before the Sabbath —- [these are] the words of R' Meir.  But the Sages say: [Everything is removed] at its [usual] time;  R' Elazer bar Tzadok says: Terumah [must be removed] before the Sabbath and chullin at its [usual] time.