I Re 19:8 Midrash: Sifrei Devarim, Midrash Tanchuma Buber, Midrash Tanchuma & Pirkei DeRabbi Eliezer

(Devarim 1:2) "Eleven days from Chorev by way of Mount Seir to Kadesh Barnea": In eleven days they went from Chorev to Kivroth Hata'avah and from Kivroth Hata'avah to Chatzeroth and from Chatzeroth to the desert of Paran.

If Israel had been meritorious, then in eleven days they would have entered Eretz Yisrael, but because they corrupted their ways, the L-rd stretched it into forty years, as it is written (Bamidbar 14:34) "According to the number of days that you spied out the land, forty days — a day for a year, a day for a year — shall you bear your sins." R. Yehudah says: Now did it take them eleven days? Did it not take them only three days? As it is written (Ibid. 10:33) "And they traveled from the mountain of the L-rd a journey of three days." (The intent is that) in three days Israel traveled an eleven-day distance. If Israel had been meritorious, they would have entered Eretz Yisrael in three days. As it is written (Ibid.) "And the ark of the covenant of the L-rd preceded them, a distance of three days to look out a resting place for them," "a resting place" being Eretz Yisrael, as it is written (Devarim 12:9) "For you will not yet have come to the rest and to the inheritance that the L-rd your G-d gives you." They said to him: Was it an eleven-day distance? Was it not a forty-day distance, as it is written of Eliyahu (I Kings 19:8) "And he arose and ate and drank, and he walked on the strength of that meal for forty days and forty nights (until the mountain of G-d, Chorev")? … R. B'na'ah says: If Israel had been meritorious, they would have entered Eretz Yisrael in one day, as it is written (Shemoth 13:4-5) "This day you go out, in the month of spring," immediately (followed by) "And it shall be, when the L-rd brings you to the land of Canaan." Abba Yossi b. Chanan says in the name of Cohein Bardela: If Israel had been meritorious, as soon as their horses' hooves ascended from the sea, they would have entered Eretz Yisrael, as it is written (Devarim 1:21) "Go up (from the sea) and possess (the land) as the L-rd, the G-d of your fathers has spoken to you."

(Exod. 3:1, cont.:) AND HE CAME TO HOREB, THE MOUNTAIN OF GOD. R. Simeon ben Jose ben Leqonya said: Moses' flock went forty days without eating and without tasting anything, just as Elijah, of blessed memory, did. [It is so stated (in I Kings 19:8): ARISING, HE ATE AND DRANK. THEN ON THE STRENGTH OF THAT FOOD HE WENT FORTY DAYS AND FORTY NIGHTS UNTO HOREB, THE MOUNTAIN OF GOD.]