Paul quoting the O.T. to prove a point, on the assumption that Scripture is God's word:
In other words, you have no proofs. Therefore I take this as an admission of non Sola Scriptura, as I do for all those others who claim this. You are not alone, certainly.
That's the best you can do as a rebuttal, copying and pasting "In other words, you have no proofs" ?
Cordially,