Manava Dharmashastra 5.193

Manvarthamuktāvalī 5.193

eṣāṃ sarveṣāṃ pitṝṇāṃ yasmādutpattiye ca pitaro yairbrāhmaṇādibhiryairniyamaiḥ śāstroktakarmabhirupacaraṇīyā bhaveyustānsākalyena śṛṇuta|