Ashtangasamgraha 49.16

49.16

tataḥ śuddhaśarīrāya kṛtasaṃsarjanāya ca |

trirātraṃ pañcarātraṃ vā saptāhaṃ vā ghṛtānvitam |

dadyādyāvakamāśuddheḥ purāṇaśakṛto 'thavā ||

Then, for one whose body has been purified and who has undergone the dietary transition, / one should give barley gruel mixed with ghee for three nights, five nights, / or a week, until old feces are thoroughly eliminated.