Kautilya's Arthashastra 7.12.18

7.12.18

tatrāpi "vāristhalapathayor vāripathaḥ śreyān, alpavyayavyāyāmaḥ prabhūtapaṇyodayaś ca" ity ācāryāḥ //

My teacher says that of the two trade-routes, one by water and another by land, the former is better, inasmuch as it is less expensive, but productive of large profit.