Why does the Torah refer to the east using the double expression "Keidmah Mizrachah"?
Rashi: "Keidmah" is another name for east, because it means 'front', 1 and the west is therefore sometimes referred to as 'Achor' ('back'). 2
Refer to 26:18:1:1**.
As in Eikev Devarim, 11:24 (Rashi).