Atharvaveda 11.3.47

11.3.47

[4.16]a) tátaś cainam anyā́bhyāṃ prápadābhyāṃ prā́śīr yā́bhyāṃ caitáṃ pū́rva ŕ̥ṣayaḥ prā́śnan |
[4.16]b) sarpás tvā haniṣyatī́ty enam āha |
[4.16]c) táṃ vā́ aháṃ nā́rvā́ñcaṃ ná párāñcaṃ ná pratyáñcam |
[4.16]d) savitúḥ prápadābhyām |
[4.16]e) tā́bhyām enaṃ prā́śiṣaṃ tā́bhyām enam ajīgamam |
[4.16]f) eṣá vā́ odanáḥ sárvāṅgaḥ sárvaparuḥ sárvatanūḥ |
[4.16]g) sárvāṅga evá sárvaparuḥ sárvatanūḥ sáṃ bhavati yá eváṃ véda ||47|| [16]

If thou hast eaten it with other front-feet than those with which the ancient seers ate this, a serpent will slay thee: thus one says to him; it verily [have] I not [eaten] coming hither, nor retiring, nor coming on; with Savitar's front-feet, therewith have I etc. etc.