I understand you're looking for the PDF of Durusul Lughah Gontor (also known as Durūs al-Lughah or Kitab Durusul Lughah al-'Arabiyyah ) , which is the famous Arabic textbook used at Pondok Modern Darussalam Gontor.
: If you prefer a printed version, they are widely available on Indonesian marketplaces like . Prices typically range from Rp7.500 to Rp76.000 , with an average price of around durusul lughah gontor jilid 1 pdf