Lutheran Online Bible Study Lcms Where Is "closed Communion" Supported In The Bible?

Where is "closed communion" supported in the Bible? - lutheran online bible study lcms

I study about the different parts of Lutheranism at this time because my husband wants to visit a Lutheran church family. I was born again a Christian since 2003, rather have no names. But if you want to do save my husband that I go. So I will my church on other days of the week. However, there are many teachings of disagreement between the three branches - Wels, ELCA, Missouri. My main concern about beef closed community (/ Prayer / community). Can someone me a hint in the Bible? I can not find one online. Thank you.

PS - I am trying to find the biblical tone of the three branches, we have everyone in a mile from our house.