Ali Baba's wife went home, set the measure upon the heap of gold, filled it, and emptied it often upon the sofa, till she had done, when she was very well satisfied to find the number of measures amounted to so many as they did, and went to tell her husband, who had almost finished digging the hole. While Ali Baba was burying the gold, his wife, to show her exactness and diligence to her sister-in-law, carried the measure back again, but without taking notice that a piece of gold had stuck to the bottom. "Sister," said she, giving it to her again, "you see that I have not kept your measure long. I am obliged to you for it, and return it with thanks." As soon as Ali Baba's wife was gone, Cassim's wife 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.