The Compendium of Caraka 3.3.10

3.3.10

vātājjalaṃ jalāddeśaṃ deśāt kālaṃ svabhāvataḥ/
*vidyādduṣparihāryatvādgarīyastaramarthavit//

Water is [more grave] than wind, land than water, and time than land by nature;
one who understands the matter should know [this] to be progressively graver due to the difficulty of avoiding [it].