[TOMT] What's the song this reminds me of, at 1:23 to 1:31? Adoramus Te Domine (Traditional) by Woo

I'm listening to the song Adoramus Te Domine (Traditional) by Woo, and at about 1:25 into the song there's a couple notes that seem EXTREMELY familiar. It's driving me mad.

Note I don't mean the church music Adoramus Te Domine, which isn't relevant for this TOMT!