SB 5.17.5

tatra caturdhā bhidyamānā caturbhir nāmabhiś catur-diśam abhispandantī nada-nadī-patim evābhiniviśati sītālakanandā cakṣur bhadreti.
Synonyms: 
tatra — there (on top of Mount Meru); caturdhā — into four branches; bhidyamānā — being divided; caturbhiḥ — with four; nāmabhiḥ — names; catuḥ-diśam — the four directions (east, west, north and south); abhispandantī — profusely flowing; nada-nadī-patim — the reservoir of all great rivers (the ocean); eva — certainly; abhiniviśati — enters; sītā-alakanandā — Sītā and Alakanandā; cakṣuḥ — Cakṣu; bhadrā — Bhadrā; iti — known by these names.
Translation: 
On top of Mount Meru, the Ganges divides into four branches, each of which gushes in a different direction [east, west, north and south]. These branches, known by the names Sītā, Alakanandā, Cakṣu and Bhadrā, flow down to the ocean.