Manava Dharmashastra 3.132

3.132

iriṇaṃ ūṣaram | yasmin kṣetre bhūmidoṣāt bījamuptaṃ na codgacchati tadiriṇam | yatra vaptā karṣako na labhate phalam | evamanṛce vedādhyayanarahite havirdevaṃ pitryaṃ ca dattvā na labhate phalam | 'anṛca' iti saptamyantam | ṛco vedopalakṣaṇārtham |

Just as having sown the seed in barren soil, the sower reaps no harvest,—even so, having given the offerings to one ignorant of the Veda, the giver obtains no reward.—(142)

Medhātithi’s commentary (manubhāṣya):
‘Barren soil’—Unproductive ground. that plot of land is called ‘barren’ on which if seed is sown, it does not sprout; there the ‘sower reaps no harvest.’

‘Even so,’ ‘to the person ignorant of die Veda’—‘having given the offerings made to gods and ancestors,—‘the giver obtains no reward.’

The term ‘anṛce’ is with the Locative ending; and the term ‘ṛk’ stands for the Veda in general.—(142)