Why does the Torah use the double expression "Im Shacho'ach Tishkach"?
Rashi (in 11:13): 'Once you begin to forget, you will go on to forget everything'. 1
Rashi: As it states in Megilas Chasidim (or Megilas S'tarim - [It is also a Sifri]) 'If you will abandon Me for one day, I will abandon you for two!' (See Sifsei Chachamim there. In other words, when you forget Hashem, He forgets you
Why does the Torah use the double expression "Ki Avod Toveidun"?