One verse

Srimad Bhagavatam 1.13.52

1.13.52

स्रोतोभि: सप्तभिर्या वै स्वर्धुनी सप्तधा व्यधात् । सप्तानां प्रीतये नाना सप्तस्रोत: प्रचक्षते ॥ ५२ ॥

srotobhih saptabhir ya vai svardhuni saptadha vyadhat saptanam pritaye nana sapta-srotah pracaksate

srotobhih
by currents
saptabhih
by seven (divisions)
ya
the river
vai
certainly
svardhuni
the sacred Ganges
saptadha
seven branches
vyadhat
created
saptanam
of the seven
pritaye
for the satisfaction of
nana
various
sapta-srotah
seven sources
pracaksate
known by name.

The place is called Saptasrota (divided by seve) because there the waters of the sacred Ganges were divided into seven branches. This was done for the satisfaction of the seven great rsis.