"Tasya" is form of "He" or "It" with 6th vibhakti of Kaarak. Please see the table of "Sah" (meaning "He") below :
Originally Posted by Mana
Sah (m)Masculine Singular Dual Plural
Nominative (1st) saḥ tau te
VocativeAccusative (2nd) tam tau tān
Instrumental (3rd) tena tābhyām taiḥ
Dative (4th) tasmai tābhyām tebhyaḥ
Ablative (5th) tasmāt tābhyām tebhyaḥ
Genitive (6th) tasya tayoḥ teṣām
Locative (7th) tasmin tayoḥ teṣu
For It only the Nominative and Vocative Accusative cases are changed. Others remain the same :
Tat (meaning "It", Neutar Gender) Masculine Singular Dual Plural
Nominative (1st) Tat te tāni
Vocative Accusative (2nd) Tat te tāni
From 3rd to 7th vibhaktis would remain the same as for Sah meaning "He".
TasyAm doesn't mean "On the Bank of the River Sarasvati". TasyAm is locative form of Saa i.e. "She". "Tasya" is Sixth vibhakti for Sah (He, Masculine) .... for Feminine Gender i.e. Saa (She, feminine) has seventh (locative) form as TasyAm which means "In Her/ On her etc.". So, what you are reading is not an exact translation but commentary of the verse where the writer has added words/phrases/his own opinion to make the meaning of the verses easier for the reader. You may have to read Word-by-word translation to understand how the translation has been done.
Last edited by devotee; 30 March 2015 at 06:27 AM.
"Om Namo Bhagvate Vaasudevaye"