The Compendium of Caraka 8.5.3

8.5.3

atha netrāṇi bastīṃśca śṛṇu varjyāni karmasu/
netrasyājñapraṇītasya &vyāpadaḥ sacikitsitāḥ//

Now hear about the pipes and enema [bags] that are to be avoided in treatments,
and the complications of a pipe administered by the ignorant, together with their treatments.