Canto 1 - Boyhood
Bāla-kāṇḍa
Chapter 35: The History of Gaṅga
Text 1.35.13
त्रैलोक्यं कथमाक्रम्य गता नदनदीपतिम्॥
trailokyaṁ katham ākramya gatā nada-nadī-patim
trailokyam = the three worlds; katham = how; ākramya = did she passed and; gatā = become; nada-nadī-patim = the chief of the rivers.
How did she pass through the three worlds and become the chief of the rivers?