My father is trying to find out if a pasuk is ever quoted in any davening and I don't know of a specific resource which would help in a search. Other than using ctrl-f after downloading each siddur/machzor, or running a Bar Ilan search while including the siddurim they have in the database, is there any place that catalogues every pasuk and where it is quoted?
And for the record, I am trying to avoid sending others on my own wild goose chase, but if you are interested, or happen to have an answer, here is my dad's question:
"I'm looking for Isaiah 62:1. The only reference I can find is in one of the Selichot between RH and YK, but even there only part of the verse is quoted. The part cited is the first part and I'm looking for one that contains the second half or the whole verse."