But nowadays men can not love seven night but they must have all their desires: that love may not endure by reason; for where they be soon accorded and hasty, heat soon it cooleth. Right so fareth love nowadays, soon hot soon cold: this is no stability. But the old love was not so; men and women could love together seven years, and no lycours lusts were between them, and then was love, truth, and faithfulness: and lo, in likewise was used love in King Arthur’s days.

No picture available
Thomas Malory (c. 1415-1471) English writer
Le Morte d’Arthur, Book 18, ch. 25 (1485)
    (Source)