The NT also talks about women wearing head coverings. There is nothing about Sunday worship either. Last night as I was reading the Bible, I smiled to myself at some of the many references of the "hand of God" and being sheltered under his "feathers." If people are LITERAL, they think God has an actual hand or feathers. Hank Hanegraff exposed a lot of the lunatics who take the Bible literally. Not everything in the Bible is meant to be Literal. However, I fully believe in its inerrancy and truth. I'm not a legalistic whore about what's in there though; I had a plenty of experiences with those kind of people years ago. I'm in a good Bible-believing church right now that offers forgiveness for our sins. If you want to get hung up on this stuff, go right ahead, but see how many people you bring into the fold.
If not literal, then the Bible means only what any individual wants it to mean, so none of these discussions matter anyway.
The Bible indicates when figures of speech are being employed. Otherwise, the words should be believed by their normal-literal interpretation.