Arthashastra
मार्गशीर्षीं तैषीं च अन्तरेण दीर्घ कालां यात्रां यायात्, चैत्रीं वैशाखीं च अन्तरेण मध्यम कालाम्, ज्येष्ठामूलीयाम् आषाढीं च अन्तरेण ह्रस्व कालाम्, उपोषिष्यन् व्यसने चतुर्थीम् ॥
He has to undertake a long march between the months of Márgasírsha (December) and Taisha (January), a march of mean length between March and April, and a short march between May and June; and one, afflicted with troubles, should keep quiet.
english translation
mArgazIrSIM taiSIM ca antareNa dIrgha kAlAM yAtrAM yAyAt, caitrIM vaizAkhIM ca antareNa madhyama kAlAm, jyeSThAmUlIyAm ASADhIM ca antareNa hrasva kAlAm, upoSiSyan vyasane caturthIm ॥
hk transliteration by Sanscript