Atharvaveda 11.3.37

11.3.37

[4.6]a) tátaś cainam anyáir dántaiḥ prā́śīr yáiś caitáṃ pū́rva ŕ̥ṣayaḥ prā́śnan |
[4.6]b) dántās te śatsyantī́ty enam āha |
[4.6]c) táṃ vā́ aháṃ nā́rvā́ñcaṃ ná párāñcaṃ ná pratyáñcam |
[4.6]d) r̥túbhir dántaiḥ |
[4.6]e) táir enaṃ prā́śiṣaṃ táir enam ajīgamam |
[4.6]f) eṣá vā́ odanáḥ sárvāṅgaḥ sárvaparuḥ sárvatanūḥ |
[4.6]g) sárvāṅga evá sárvaparuḥ sárvatanūḥ sáṃ bhavati yá eváṃ véda ||37|| [6]

If thou hast eaten it with other teeth than those with which the ancient seers ate this, thy teeth will fall out (çad): thus one says to him; it verily [have] I not [eaten] coming hither, nor retiring, nor coming on; with the seasons as teeth, therewith have I etc. etc.