Kautilya's Arthashastra 2.9.25

2.9.25

yo mahaty arthasamudaye sthitaḥ kadaryaḥ samnidhatte 'vanidhatte 'vasrāvayati vā - samnidhatte svaveśmani, avanidhatte paurajānapadeṣu, avasrāvayati paraviṣaye - tasya sattrī mantrimitrabhṛtyabandhupakṣam āgatiṃ gatiṃ ca dravyāṇām upalabheta //

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.