The Compendium of Caraka 1.19.9

1.19.9

catvāraścāṣṭakā vargāḥ ṣaṭkau dvau saptakāstrayaḥ /
aṣṭodarīye rogāṇāṃ rogādhyāye prakāśitāḥ //

and four groups of eight, two sets of six, and three sets of seven / have been expounded in the chapter on diseases entitled “The Eight Abdominal Diseases” [Aṣṭodarīya].