This is also false.
The kasra of «نَزَالِ» and «تَرَاكِ» is a fixed ending.
The kasra of «زَيْدٍ» after «بِ» marks genitive case.
Identical vowel shapes can have different grammatical explanations.
Opening interactive controls...
Error: Every Kasra Marks Genitive
Asmāʾ al-Afʿāl — Definition, Uses and Parsing
This is also false.
The kasra of «نَزَالِ» and «تَرَاكِ» is a fixed ending.
The kasra of «زَيْدٍ» after «بِ» marks genitive case.
Identical vowel shapes can have different grammatical explanations.