Manava Dharmashastra 5.204

Manvarthamuktāvalī 5.204

ārakṣo rakṣā teṣāṃ pitṝṇāṃ rakṣābhūtaṃ daivaṃ viśvedevabrāhmaṇaṃ pūrvaṃ nimantrayet| yasmādrakṣāvarjitaṃ śrāddhaṃ rākṣasā ācchindanti |