As soon as Ali Baba’s wife was gone, Cassim’s looked at the bottom of the measure, and was in inexpressible surprise to find a piece of gold sticking to it.  Envy immediately possessed her breast.  “What!” said she, “has Ali Baba gold so plentiful as to measure it?  Whence has he all this wealth?”

Cassim, her husband, was at his counting-house.  When he came home, his wife said to him, “Cassim, I know you think yourself rich, but Ali Baba is infinitely richer than you.  He does not count his money, but measures it.”  Cassim desired her to explain the riddle, which she did, by telling him the stratagem she had used to make the discovery, and showed him the piece of money, which was so old that they could not tell in what prince’s reign it was coined.

Cassim, after he had married the rich widow, had never treated Ali Baba as a brother, but neglected him; and now, instead of being pleased, he conceived a base envy at his brother’s prosperity.  He could not sleep all that night, and went to him in the morning before sunrise.  “Ali Baba,” said he, “I am surprised at you; you pretend to be miserably poor, and yet you measure gold.  My wife found this at the bottom of the measure you borrowed yesterday.”

By this discourse, Ali Baba perceived that Cassim and his wife, through his own wife’s folly, knew what they had so much reason to conceal; but what was done, could not be undone.  Therefore, without showing the least surprise or trouble, he confessed all, and offered his brother part of his treasure to keep the secret.

“I expect as much,” replied Cassim haughtily; “but I must know exactly where this treasure is, and how I may visit it myself when I choose; otherwise, I will go and inform against you, and then you will not only get no more, but will lose all you have, and I shall have a share for my information.”

Ali Baba told him all he desired, even to the very words he was to use to gain admission into the cave.

Cassim rose the next morning long before the sun, and set out for the forest with ten mules bearing great chests, which he designed to fill, and followed the road which Ali Baba had pointed out to him.  He was not long before he reached the rock, and found out the place, by the tree and other marks which his brother had given him.  When he reached the entrance of the cavern, he pronounced the words, “Open, Sesame!” The door immediately opened, and, when he was in, closed upon him.  In examining the cave, he was in great admiration to find much more riches than he had expected from Ali Baba’s relation.  He quickly laid as many bags of gold as he could carry at the door of the cavern; but his thoughts were so full of the great riches he should possess, that he could not think of the necessary word to make it open, but instead of “Sesame,” said, “Open, Barley!” and was much amazed to find that the door remained fast shut.  He named several sorts of grain, but still the door would not open.