When Lady Birgitta now wished to return from Jerusalem to Rome, she went on the birthday of the Virgin Mary to visit her sepulchre and the other shrines that are there near the city of Jerusalem. As she prayed at the said sepulchre, that same Virgin appeared to her, assuring her about the time of her death and assumption and testifying that this was literally her sepulchre.
Chapter 26

When I was in the Valley of Jehoshaphat, praying at the sepulchre of the glorious Virgin, that same Virgin appeared to me, shining with exceeding splendor, and said:
"Be attentive, daughter! After my Son ascended to heaven, I lived in the world for fifteen years and as much time more as there is from the feast of the ascension of that same Son of mine until my death. And then I lay dead in this sepulchre for fifteen days.

Thereupon I was assumed into heaven with infinite honor and joy. However, my garments with which I was buried then remained in this sepulchre; and I was then clothed in such garments as those that clothe my Son and my Lord, Jesus Christ. Know also that there is no human body in heaven except the glorious body of my Son and my own body. "Therefore go now, all of you, back to the lands of Christians; ever amend your lives for the better; and in future, live with the greatest of care and attention now that you have visited these holy places, where my Son and I lived in the body and died and were buried."