The Wizard of Oz by Lynam Frank Baum Chapter 12 Page 11

When they returned to the castle the Wicked Witch beat them well with a strap, and sent them back to their work, after which she sat down to think what she should do next. She could not understand how all her plans to destroy these strangers had failed; but she was a powerful Witch, as well as a wicked one, and she soon made up her mind how to act.

There was, in her cupboard, a Golden Cap, with a circle of diamonds and rubies running round it. This Golden Cap had a charm.

Whoever owned it could call three times upon the Winged Monkeys, who would obey any order they were given. But no person could command these strange creatures more than three times. Twice already the Wicked Witch had used the charm of the Cap. Once was when she had made the Winkies her slaves, and set herself to rule