(Beraisa): R. Ilai once visited R. Elazar in Lod.

R"E said to R"I: Can you be considered one who rests on the festival? The Chachamim said that it is not correct for Torah Sages to leave their homes (without their wives) and travel on the festival!

It is like the case of R. Zeira who went to a Bris made by R. Ila and he refused to eat anything. The people were unsure if it was because he would not eat before praying Musaf or because it is not correct for Torah Sages to leave their homes and travel on the festival.

R. Elazar: (The Mishnah had taught that one may snack outside the Sukah) Only snacking is permitted but napping is not permitted outside of the Sukah.

Reason #1 (Chevraya): A person tends to fall into a deep sleep.

Reason #2 (R. Ila): Often a nap will suffice.

Question: What is the practical difference between these two reasons?

Answer: One who tells another person to wake him if he falls into a deep sleep. According to Chevraya, it is permitted to nap; according to R. Ila, it is prohibited.

(Mishnah): It occurred that they brought R. Yochanan B"Z food to taste and Rabban Gamliel two dates and a bucket of water, and they (both) said, "Bring them to the Sukah".

And when they gave R. Tzadok food smaller than the size of an egg, he took it in a cloth and ate it outside of the Sukah and did not recite Birkas HaMazon afterwards.

(Gemara): They understood that R. Tzadok did not recite the entire Birkas HaMazon afterwards, but he did recite one of the blessings.

However, a Beraisa was discovered that teaches that he did not recite any Blessing.

(Beraisa): Any food upon which Birkas HaMazon is recited afterwards, "Hamotzi" - "...He brings out bread from the ground" is recited before. Any food upon which Birkas HaMazon is not recited afterwards, "Hamotzi" - "...He brings out bread from the ground" is not recited before.

Question: If a person ate less than a K'zayis of bread, he does not recite Birkas HaMazon afterwards - should he also not recite Hamotzi before it?

Answer (R. Yaakov bar Acha): The rule refers to other types of food (such as rice or millet - since one does not recite Birkas HaMazon after them, he does not recite Hamotzi before them).