The Compendium of Caraka 8.4.23

8.4.23

vyādhivyāyāmakarmādhvakṣīṇābalanirojasām/
kṣīṇaśukrasya cātīva snehabastirbalapradaḥ//

For those emaciated, weak, and devoid of ojas due to disease, physical exercise, work, and traveling on foot,
and for one whose semen is diminished, the fat enema is exceedingly strength-giving.