The Ram (fairy tale)

[4] Andrew Lang included it under the title The Wonderful Sheep in The Blue Fairy Book.

He asked each one why her gown was the color it was; the older two had chosen theirs to symbolize their joy, and the youngest because it became her best.

The older two had dreamed he was bringing them gifts; the youngest, that he had held a ewer for her to wash her hands in.

The monkey climbed a tree and jumped from it, killing itself, but its tongue and heart were too small to deceive the king.

She lived there until she heard of her eldest sister's wedding, which she attended, but left as soon as the ceremony was done, leaving a box of treasures for the bride, returning to the ram.

She said she would stay no longer than before, but the king had all the doors shut to detain her, and brought her an ewer to wash in.

[1] As pointed by fairy tale scholar Jack Zipes, the tale of The Ram or The Royal Ram is classified as Aarne–Thompson–Uther Index ATU 425, "The Search for The Lost Husband", stories where a girl or princess is betrothed to a monstrous bridegroom, a la Beauty and the Beast.

Under the latter tale type, they classify it closer to subtype ATU 425C, "Beauty and the Beast".