For the Bnei Yisroel walked arba'im shanah in the midbar, until Kol HaGoy that were Anshei HaMilchamah, which came out of Mitzrayim, were consumed, because they obeyed not the Kol Hashem (voice of Hashem); unto whom Hashem swore that He would not show them HaAretz, which Hashem swore unto their Avot that He would give us, Eretz zavat cholov u'devash.