Atharvaveda 11.3.39

11.3.39

[4.8]a) tátaś cainam anyéna vyácasā prā́śīr yéna caitáṃ pū́rva ŕ̥ṣayaḥ prā́śnan |
[4.8]b) rājayakṣmás tvā haniṣyatī́ty enam āha |
[4.8]c) táṃ vā́ aháṃ nā́rvā́ñcaṃ ná párāñcaṃ ná pratyáñcam |
[4.8]d) antárikṣeṇa vyácasā |
[4.8]e) ténainaṃ prā́śiṣaṃ ténainam ajīgamam |
[4.8]f) eṣá vā́ odanáḥ sárvāṅgaḥ sárvaparuḥ sárvatanūḥ |
[4.8]g) sárvāṅga evá sárvaparuḥ sárvatanūḥ sáṃ bhavati yá eváṃ véda ||39|| [8]

If thou hast eaten it with another bulk (vyácas) than that with which the ancient seers ate this, the king-yákshma will slay thee: thus one says to him; it verily [have] I not [eaten] coming hither, nor retiring, nor coming on; with the atmosphere as bulk, therewith have I etc. etc.