Bede the Venerable
Catena Aurea · Lukasevangelium 2
And Joseph and his mother marvelled at those things which were spoken of him. And Simeon blessed them, and said unto Mary his mother, Behold, this child is set for the fall and rising again of many in Israel; and for a sign which shall be spoken against; (Yea, a sword shall pierce through thy own soul also,) that the thoughts of many hearts may be revealed.
No history tells us that Mary departed this life by being slain with the sword, therefore since not the soul but the body is killed with iron, we are left to understand that sword which is mentioned, And a swordin their lips, (Ps. 59:7.) that is, grief because of our Lord’s passion passed through her soul, who although she saw Christ the very Son of God die a voluntary death, and doubted not that He who was begotten of her flesh would overcome death, could not without grief see Him crucified.