The Compendium of Caraka 6.6.6

6.6.6

kṣīṇeṣu doṣeṣvavakṛṣya bastau dhātūn pramehānanilaḥ karoti/
doṣo hi bastiṃ samupetya mūtraṃ saṃdūṣya mehāñjanayedyathāsvam//

When the humors are depleted, wind, drawing the tissues into the bladder, produces urinary disorders; / for a humor, having reached the bladder and vitiated the urine, generates the urinary disorders according to its own nature.