“So would you please show the “Biblical” source for the assumption of Mary?”
Sure, just as soon as you show me the “Biblical” source for sola scriptura. Oh wait, that’s right, there isn’t any.
If scripture isn't the only infallible source for what Jesus and the apostles taught shouldn't it be easy for Catholics to show another infallible source showing the apostles teaching the assumption of Mary?
Galatians 1:8 But though we, or an angel from heaven, preach any other gospel unto you than that which we have preached unto you, let him be accursed.
Jesus replied, "Your mistake is that you don't know the Scriptures, and you don't know the power of God. (Matt. 22:29)
Jesus sure seemed to hold to the concept and based His authority upon the sacred Scriptures. How many times did he quote Scripture to the devil when he was tempted? But, then, who is he really compared to the Roman Catholic church??? /sarc (as if that tag is necessary!)