Kaushitakagrihyasutra 3.10.30

3.10.30

moghamannaṃ vindate apracetāssatyaṃ bravīmi vadha itsa tasya nāryamaṇaṃ puṣyati no sakhāyaṃ kevalāgho bhavati kevalādī iti \30\

'In vain does the ignorant person obtain food: / I speak the truth; that indeed is his death. / He nourishes neither Aryaman nor a friend: / he who eats alone becomes one who has only guilt.'