What does "Tuv Eretz Mitzrayim" refer to?
Rashi #1: It refers to Eretz Goshen.
Rashi #2: Par'oh unknowingly prophesized 1 that when Yisrael were redeemed from Egypt, they would take all the wealth of Egypt with them, leaving it [empty] like the depths of the sea - where there are no fish.
Riva: He meant to say "Goshen". He mistakenly said "Mitzrayim". He was unaware of his prophecy.