1)
?Kol Y?mei Hashamah Tshbos ? ?. What is this Pasuk coming to teach us?
1.
Rashi: It teaches us that the land will rest the number of years corresponding to the seventy Sh'mitos and Yovlos 1 that they broke.
1
Rashi: During the period of four hundred and thirty-six years that they sinned - three hundred and ninety until the exile of the ten tribes, and forty that Yehudah continued to sin, until the prophesy of Yechezkel - which took place six years before the Churban. See Rashi here and in Yechezkel, 4:5, & 6.