Saurapurana 15.19

15.19

madhyataḥ prasthamekaṃ tu daridraḥ kuḍavaṃ tathā
tilālābhe yavāḥ kāryā godhūmāstadalābhataḥ

or in moderation, a prastha, and if poor, a kuḍava. / If sesame seeds are unavailable, barley should be used; if that is unavailable, wheat.