Thank you for the references, but Scripture is sufficient for instruction. The apostle Paul said so. So did Peter (”as newborn babes crave the sincere milk of the word, that by it you may grow in respect to salvation”).
So with your logic, I should not be listening at all to your own words here about these matters, since your own words in your first post in this thread, and your own words in the first half of your post here are not contained in "Scripture", but are your own words.
Likewise (according to your logic), I should never listen to any preachers "expounding on the Word", since their own words are also not contained in Scripture.
Do you see how illogical that kind of reasoning is? If you really, truly think it is wrong to add any words to Scripture, then why did you add your own words to the Scripture, right here in these two posts you made using your own words?