Arthashastra
पक्ष कक्ष उरस्यानां मिथो विषम संख्याने विषम व्यूहः ॥
Thus the surplus of the army may therefore be distributed in the above manner.
english translation
pakSa kakSa urasyAnAM mitho viSama saMkhyAne viSama vyUhaH ॥
hk transliteration by Sanscript