Kautilya's Arthashastra 2.9.26

2.9.26

yaś cāsya paraviṣaye saṃcāraṃ kuryāt tam anupraviśya mantraṃ vidyāt //

Whoever is niggardly in spite of his immense property, hordes, deposits, or sends out—hordes in his own house, deposits with citizens or country people or sends out to foreign countries;—a spy shall find out the advisers, friends, servants, relations, partisans, as well as the income and expenditure of such a niggardly person. Whoever in a foreign country carries out the work of such a niggardly person shall be prevailed upon to give out the secret. When the secret is known, the niggardly person shall be murdered apparently under the orders of (his) avowed enemy.