Matsya Purana 240.22

240.22

caturaṅgabalopetāṃ vasante vā śaradyatha.
senā padātibahulā yasya syātpṛthivīpateḥ .. 240.21 ..

He should march with a good force of infantry and elephants during the rainy season, of cavalry and chariots during the dewy and cold season, he should march with camels and mules during the hot weather, and with forefold forces during the vernal season A king whose infantry is strong can attack his foe with great vigour—20 22