पर्वसु च नदीपूजाः कारयेत् ॥ कZ_०४.३.१० ॥
parvasu ca nadīpūjāḥ kārayet
On festival/critical days, he shall have river-rites (river worship) performed.
As a state tool for cohesion and compliance during hazardous seasons—rituals align public behavior and reinforce authority in crisis-prone periods.