तत्रोपपदं सप्तमीस्थम्
SV: तत्र उपपदम् सप्तमीस्थम्
AV: none
Language meaning: The words referenced by the सप्तमीस्थ words of the sutras in this धात्वधिकार get the term ‘उपपद’.
Commentary : It is likely that this सूत्र has been inserted later after विभक्ति evolved. It is also possible that this was there since time earlier.
Literal Meaning: त ओ of त्र प प द म स प त म् [इ]] स थ म
tumbi from floating tumbi rope rope/leg give inside - gather rope tumbi inside inward gather high inside