The Compendium of Kāśyapa 8.4.45

8.4.45

arucau cātisāre ca kāryaḥ satilamāṣakaḥ
kulatthānāṃ tu niryūhe kaulattho yūṣa ucyate

in loss of appetite and in diarrhoea, it should be prepared with sesame and black gram.
A decoction of horsegram is called horsegram soup;