Therefore it shall  be , when the  LORD  thy  God  hath given thee  rest  from  all  thine  enemies  round  about , in the  land  which  the  LORD  thy  God  giveth  thee   for   an  inheritance  to  possess  it,   that   thou shalt blot  out  the  remembrance  of  Amalek  from  under  heaven ; thou shalt  not  forget   it  .