I was having a discussion with someone who stated they only believed what Jesus stated & not the OT as it "was not reliable". So I asked him ," when Jesus quotes the OT do you believe those verses by themselves or the whole book he quoted from"? Which led me to wonder how many times did Jesus quote from the OT. Honestly I don't think it will make a difference to this person as he's all over the map, but I'm curious now.