Ashtangasamgraha 28.75

28.75

netraṃ daśāṅgulaṃ mudgapraveśaṃ caturaṅgulam |

apatyamārge yojyaṃ syāddvyaṅgulaṃ mūtravartmani ||

punarnavātavakṣīrīkākolīdhanvayāsakaiḥ ||

The tube should be ten fingers long, permitting the entry of a mung bean, [and inserted] four fingers / into the birth canal; it should be two fingers [long] in the urinary passage. / [Medicated oil prepared] with punarnavā, tavakṣīrī, kākolī, and dhanvayāsa