The works of Ādi Śaṅkarācārya

Sanatsujātīyam

p. 285

p. 285

नैव तन्न यजुःषु नाप्यथर्वसु

In plain words

That is not there either — not in the Yajus verses, and not even in the Atharva.

Close to the Sanskrit

Not at all is That — not in the Yajus verses, nor even in the Atharvans.