What are the connotations of "ba'Boker ba'Boker"?
Rashi (in Shabbos 117b): It means that they collected the Manna early in the morning.
Targum Yonasan: It means that they collected the Manna up until four hours in the morning, when the weather became hot.
Seforno: It means that they collected the Manna each and every morning, to prevent it from melting.
Berachos 26a: It means that they went one hour before Hanetz ha'Chamah, to collect the Manna. 1
See Torah Temimah, citing the Yerushalmi Berachos, 1:1, and note 24. Also see Torah Temimah to 30:7, note 7.
What is the definition of 'v'Cham ha'Shemesh'?
Berachos 17a: It means four hours after dawn-break -- seeing as "k'Chom ha'Yom" (Bereishis 18:1) is six hours after dawn-break. 1
See Torah Temimah, note 28. See also Torah Temimah, citing Berachos 17a #2, and note 27.
What happened to the leftover Manna?
Rashi #1 (citing the Mechilta) and Targum Yonasan: When the sun became hot, 1 it melted and turned into rivers, 2 from which the deer drank. The nations of the world trapped them and tasted the taste of Manna 3 (Rashi). 4
Rashi #2 (to Iyov 6:14): It disintegrated.
Targum Yonasan: After four hours into the day.
Targum Yonasan: Which flowed into the sea.
Upon which they realized the good fortune of Yisrael (Rashi). According to Targum Yonasan, after various specious of Kasher animals would drink from those rivers, Yisrael would catch those animals and eat them (tasting the taste of Manna).
See also Ba'al ha'Turim.
QUESTIONS ON RASHI
Rashi writes: "When the sun warmed, it melted - [I.e.,] what was left [ungathered] in the field melted... gazelles and deer would drink from it. Gentiles would trap [these animals], taste of the Manna, and know the greatness of Yisrael." What is the impetus for Rashi to cite this interpretation?
Gur Aryeh: Why did Hashem provide a surplus of Manna in the fields? We see that the amount Bnei Yisrael brought home was miraculously precise, such that there was nothing extra! It must be that the surplus Manna also had a specific purpose - as Chazal interpret here.
