I don't remember where I know this song from, but it sounds like a lady or a man with a womanly voice singing something like:
_______ the niiight away...
_______ the niiiiight away...
(the 'i' in 'night' is slightly more longer and higher note the second time)
It sounds like an older synth-pop style song, like it's from the 70s or 80s or something.
I feel like I want to say the missing word ends with an "-ing" (like dancing or wishing) but I can't say for sure.