Mid-2010s song search

Alright, this is driving me crazy, and I feel like I remember so little that it’s a pretty long shot, but here we go:

• probably from the mid-2010s, because I feel like I first heard it in 2014 or 2015?
• female vocalist
• sounded kind of dramatic and choral
• I feel like there’s a line that goes like “we require nothing but your generosity” and the outro is definitely “we just want more/ we just want more/ we only need more” alternating between the singer’s high and low registers
• everything I Google comes up as weird worship songs but it definitely wasn’t Christian pop (though it did lean into like kind of culty vibes)

I know that’s not much but I feel like I’m so close to remembering this song that it’s driving me crazy. Any help is much appreciated!