THE REASON WHY ONE CHALAH HAS A SHI'UR (Yerushalmi Chalah Perek 4 Halachah 4 Daf 26b)
ùì àåø éù ìä ùéòåø ùäåà ãáø úåøä. ùì ëäï àéï ìä [ãó ëæ òîåã à] ùéòåø ùäéà îãáøéäï.
[Chalah] for fire has a Shi'ur, for it is mid'Oraisa. The one for a Kohen has no Shi'ur, for it is mid'Rabanan.
åéôøéù ìàåø åìà éôøéù ìëäï.
Question: He should separate for fire (mid'Oraisa), and not for a Kohen!
ùìà éäå àåîøé' øàéðå úøåîä èäåøä ðùøôú.
Answer: This is lest people say 'we saw Tahor [Chalah, which is like] Terumah (of Eretz Yisrael) burned. (Now that they must separate two Chalos, it is known that it is of Chutz la'Aretz - GRA.)
åéôøéù ìëäï åìà éôøéù ìàåø.
Question: (In the Seifa, from the river and Amnom and outside, Chalah for fire has no Shi'ur, and for a Kohen has a Shi'ur.) He should separate for a Kohen, and not for fire!
ùìà éäå àåîøéí øàéðå úøåîä èîàä ðàëìú. îúåê ùäåà îôøéù ùúéäï ìëùäåà áà ìëàï äåà ðùàì.
Answer: This is lest people say 'we saw Tamei Terumah eaten.' Since he separates two Chalos, it is known that it is of Chutz la'Aretz - GRA.)
[ãó îå òîåã à (òåæ åäãø)] åæå åæå îãáøéäï äåà. îåèá ìøáåú áðàëìú åìà ìøáåú áðùøôú:
Both of these are mid'Rabanan. It is better to increase the one that is eaten (it has a Shi'ur), and not to increase the one that is burned.