Agnipurana 190.5

190.5

evamevānumāsañca cāturmāsyo vidhiḥ smṛtaḥ /
anyaccaitrādimāseṣu śaktupātrāṇi(1) cārpayet //

In this very manner, month by month, the four-month rite is remembered. / Further, in the months beginning with Caitra, he should also offer vessels of roasted grain flour;