Charak Samhita
कालक्रमज्ञः सहसा न च तक्रं निवर्तयेत्। तक्रप्रयोगो मासान्तः क्रमेणोपरमो हितः॥८२॥
The physician acquainted with the time (kala) and procedure of administration (karma) should not discontinue butter-milk all of a sudden. Butter-milk should be administered up to one month, and thereafter, it should be gradually withdrawn.
english translation
kAlakramajJaH sahasA na ca takraM nivartayet। takraprayogo mAsAntaH krameNoparamo hitaH॥82॥
hk transliteration by Sanscript