In the 1981 film Excalibur, adapted from "Le Morte d'Arthur" by Sir Thomas Malory.
When after years and years lost to an evil spell, King Arthur is free and strong and purposeful once more, he pays Queen Guinevere a visit, at the convent where she had retreated from the world and had become a nun.
In her chamber, Guinevere reaches under her bed and produces what seems like a miracle: Excalibur itself, which Arthur had regarded as utterly lost. As Arthur takes and wields Excalibur in a mixture of disbelief and delight, Guinevere whispers happily, "I kept it".
Then Arthur reels off these parting words, which I shall try to reconstruct from pure memory:
I have often dreamt, that in the hereafter of our lives,
when I am just a man, and owe no more to the future,
you will come to me, and claim me yours,
and know that I am your husband. It is a dream I have...
Then Arthur turns, wielding Excalibur, and leaves, en route to fulfill his destiny for one final time.