Why does it say "Hikah Tzur"?
Radak: The water exuded via hitting it, in Refidim.
Why does it say "Tzur"? Verse 15 said "Tzurim"!
Radak: When they requested meat in Kivros ha'Ta'avah, this was before Mei Merivah in Kadesh. The singular refers to the rock in Refidim. (Above refers also to the rock in Kadesh - PF.)
What is the meaning of "u'Nchalim Yishtofu"?
Radak: Much water exuded, until there were great rivers where it flowed.
Did they question His ability to give bread?
Radak: Here, "Lechem" refers to meat, like "Es Korbani Lachmi" (Bamidbar 28:2).
Malbim: They thought that now that He gave water, His strength decreased, and He cannot give also bread and meat. They thought that He continued to give bread, and ceased giving meat (and not vice-versa), because bread is more essential.
What is "She'er"?
Rashi: It is meat. Radak - the matter is repeated in different words.
