Arthashastra
अत्युष्णम् अल्प यवस इन्धन उदकं वा देशं हेमन्ते यायात् ॥
Or he may march during the dewy season against a country which is of hot climate and in which fodder and water are obtained in little quantities.
english translation
atyuSNam alpa yavasa indhana udakaM vA dezaM hemante yAyAt ॥
hk transliteration by Sanscript