Kautilya's Arthashastra 12.4.4

12.4.4

skandhāvāre vāsya śauṇḍikavyañjanaḥ putram abhityaktaṃ sthāpayitvāvaskandakāle rasena pravāsayitvā "naiṣecanikam" iti madanarasayuktān madyakumbhān śataśaḥ prayacchet //

Or having put a banished prince in the enemy's camp; a spy disguised as a vintner in the service of the enemy, may distribute as a toast hundreds of vessels of liquor mixed with the juice of the madana plant; or, for the first day, he may distribute a mild or intoxicating variety of liquor, and on the following days such liquor as is mixed with poison; or having given pure liquor to the officers of the enemy's army, he may give them poisoned liquor when they are in intoxication.