Arthashastra
गम्य शैल निम्न विषमा मर्दनीय वृक्षा छेदनीय व्रतती पङ्क भङ्गुरा दरण हीना च हस्ति भूमिः ॥
That which is uneven with assailable hills and valleys, which has trees that can be pulled down and plants that can be torn, and which is full of muddy soil free from thorns is the ground for elephants.
english translation
gamya zaila nimna viSamA mardanIya vRkSA chedanIya vratatI paGka bhaGgurA daraNa hInA ca hasti bhUmiH ॥
hk transliteration by Sanscript