Mahabharata 12.119.16

कोशश्च सततं रक्ष्यो यत्नमास्थाय राजभिःकोशमूला हि राजानः कोशमूलकरो भव

kośaśca satataṃ rakṣyo yatnamāsthāya rājabhiḥkośamūlā hi rājānaḥ kośamūlakaro bhava

Our plain-language meaning of this verse is waiting for scholar review.