As for your "show me" statement, you need look no further than 1 Corinthians 4:6. It warns believers not to search any further than the scriptures for their beliefs (emphasis mine).
Now these things, brethren, I have figuratively applied to myself and Apollos for your sakes, so that in us you may learn not to exceed what is written, so that no one of you will become arrogant in behalf of one against the other.
There is nothing wrong with tradition. However, any church tradition -- from Baptists to Catholics to Pentecostals -- that go beyond what is written in the scriptures is a danger.
Jesus condemned certain Pharisee leaders for creating oral traditions that went beyond the scriptures:
Matt 15:1-3 "Then the scribes and Pharisees who were from Jerusalem came to Jesus, saying, "Why do Your disciples transgress the tradition of the elders? For they do not wash their hands when they eat bread." He answered and said to them, "Why do you also transgress the commandment of God because of your tradition?"
Jesus chastised the Pharisees leaders for substituting their oral tradition for scripture. Remember also that when a group of Jews laid claim to their salvation because of their Jewish heritage, Jesus said that he could raise sons of Moses from the stones of the ground. He can do the same with any group of Christians, no matter how old they claim their church to be.
Protestant fantasy. Besides, "general agreement," is not good enough if you believe sola scriptura. You can't have it both ways without complete loss of credibility.
As for your "show me" statement, you need look no further than 1 Corinthians 4:6.
This is the problem with do-it-yourself hermanutics, if I point out this scripture does not tell you "what is written" is referring to scripture, I'll either be told "it's self-evident," (which it isn't), or asked to produce what else it could be (which is irrelevant). In either case, what will be ignored is that the text does not specifically say "scripture" but you advertise it in such a way as to claim it does.
Similarly, anytime the phrase "word of God" shows up, Protestants mentally substitute "bible" when the bible itself tells us God's word is not restricted to its pages.