Mothra song in Tagalog

Bit of Pinoy Trivia: This is an extract from Mothra versus Godzilla (1964). You can hear the tiny islander girls played by twin sisters Emi and Yumi Ito (the singing duo called The Peanuts) singing in Tagalog:

Naiintindihan mo ba?
Mayroon ba doon?
Pumunta ka lang dito.
Halika't maupo.

(Do you understand? Is there something over there? Come over here. Sit down.)

The phrase "Halika't maupo" is kind of an old-fashioned, or literary way of speaking. Makes me wonder if this isn't a straight rip from some old kundiman. Would appreciate it if anyone could say for sure. The composer is Akira Ifukabe, who composed the eerie music of the Mothra movies.