Karnatakabhashabhushana 3.3.2

3.3.2

m, am, im, ke, at, at, baḷ, iti tāḥ punaḥ sapta vibhaktayō jñātavyaḥ.

Those, moreover, are to be recognized as the seven case inflections: m, am, im, ke, at, at, [and] baḷ.