Kautilya's Arthashastra 5.1.7

5.1.7

śastreṇa rasena vā vikrāntaṃ tatraiva ghātayed "bhrātṛghātako 'yam" iti //

A spy may instigate the brother of a seditious minister and with necessary inducements, take him to the king for an interview. The king, having conferred upon him the title to possess and enjoy the property of his seditious brother, may cause him to attack his brother; and when he murders his brother with a weapon or with poison, he shall be put to death in the same spot under the plea that he is a parricide.