The Compendium of Caraka 3.5.21

3.5.21

saṃdhāraṇādatyaśanādajīrṇādhyaśanāttathā/
varcovāhīni duṣyanti durbalāgneḥ kṛśasya ca//

From suppression [of urges], overeating, eating before digestion of the previous meal,
and in one whose digestive fire is weak and who is emaciated, the channels carrying feces become vitiated.