A farmer had an old ox.

He had a donkey too.

The ox and the donkey were friends.

One evening, the ox told the donkey, "I am very tired today."

Another evening the ox told the donkey, "I did not rest today."

The donkey replied, "I worked harder than you."

The next day, the ox said, "Today was a bad day."

The donkey said, "When the farmer comes, say, 'Moo!' He will let you rest."

The next morning, the ox cried, 'Moo!' 

The farmer let him rest.

The farmer took the donkey out to plough the land.

The donkey worked hard all day.

He was very tired when he came home.

The donkey told the ox, "The farmer said he will kill you for meat."

The ox was afraid.

He said, "I will work tomorrow. I feel better now."