दिवसानुवृत्तो नित्यः ॥ कZ_०२.६.२४ ॥
divasānuvṛtto nityaḥ
Was Tag für Tag fortbesteht, heißt wiederkehrendes Einkommen (nitya).
It provides a simple operational test for classifying receipts as routine cashflow versus periodic or exceptional receipts.