Atharvaveda 11.3.42

11.3.42

[4.11]a) tátaś cainam anyénodáreṇa prā́śīr yéna caitáṃ pū́rva ŕ̥ṣayaḥ prā́śnan |
[4.11]b) udaradārás tvā haniṣyatī́ty enam āha |
[4.11]c) táṃ vā́ aháṃ nā́rvā́ñcaṃ ná párāñcaṃ ná pratyáñcam |
[4.11]d) satyénodáreṇa |
[4.11]e) ténainaṃ prā́śiṣaṃ ténainam ajīgamam |
[4.11]f) eṣá vā́ odanáḥ sárvāṅgaḥ sárvaparuḥ sárvatanūḥ |
[4.11]g) sárvāṅga evá sárvaparuḥ sárvatanūḥ sáṃ bhavati yá eváṃ véda ||42|| [11]

If thou hast eaten it with another belly than that with which the ancient seers ate this, the colic (? udaradārá) will slay thee: thus one says to him; it verily [have] I not [eaten] coming hither, nor retiring, nor coming on; with truth as belly, therewith have I etc. etc.