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.
Now show where the apostles specifically taught the assumption of Mary.
Rev.11:19 Then God's temple in heaven was opened, and the ark of His covenant was seen within His temple, and there were flashes of lightening, voices, peals of thunder, an earthquake and heavy hail.
Rev. 12:1 And a great portent appeared in heaven, a woman clothed with the sun, with the moon under her feet, and on her head a crown of twelve stars; she was with child. ... [S]he brought forth a male child, one who is to rule all the nations with a rod of iron.
We know that after the crucifixion Mary was cared for by the apostle John (Jn 19:26-27). Early Christian writings say John went to live at Ephesus and that Mary accompanied him. There is some dispute about where she ended her life, perhaps there, perhaps back at Jerusalem. Neither of these cities nor any other claimed her remains, although there are claims about possessing her (temporary) tomb. Why did no city claim the bones of Mary? Apparently because there were no bones to claim, and people knew it. -Dr. Stackpole