Final answer:
King Arthur orders Sir Bedivere to throw Excalibur into a lake. Sir Bedivere initially disobeys but eventually fulfills the command. Excalibur is caught by the Lady of the Lake.
Step-by-step explanation:
In the Arthurian legend, King Arthur orders Sir Bedivere to throw Excalibur, his magical sword, into a nearby lake.
This order must be carried out because Excalibur holds great power and should not fall into the wrong hands. It is also part of a prophecy that the sword must be returned to the Lady of the Lake.
Sir Bedivere initially disobeys the order and hides the sword. But upon King Arthur's insistence, he finally fulfills the command and throws Excalibur into the lake, where the Lady of the Lake catches it.