Kautilya's Arthashastra 2.25.13

2.25.13

kretṛṛṇāṃ mattasuptānām alaṅkārāt chādanahiraṇyāni ca vidyuḥ //

Spies stationed in the shops shall ascertain whether the expenditure incurred by customers in the shop is ordinary or extraordinary and also whether there are any strangers. They shall also ascertain the value of the dress, ornaments, and gold of the customers lying there under intoxication.