Story of sacrifice a heifer

AL-BAQARA (THE COW) : 67-74

2:67. And remember Moses said to his people: "Allah commands that ye sacrifice a heifer." They said: "Makest thou a laughing-stock of us?" He said: "Allah save me from being an ignorant (fool)!"
2:68. They said: "Beseech on our behalf Thy Lord to make plain to us what (heifer) it is!" He said; "He says: The heifer should be neither too old nor too young, but of middling age. Now do what ye are commanded!"

2:69. They said: "Beseech on our behalf Thy Lord to make plain to us Her colour." He said: "He says: A fawn-coloured heifer, pure and rich in tone, the admiration of beholders!"
2:70. They said: "Beseech on our behalf Thy Lord to make plain to us what she is: To us are all heifers alike: We wish indeed for guidance, if Allah wills."
2:71. He said: "He says: A heifer not trained to till the soil or water the fields; sound and without blemish." They said: "Now hast thou brought the truth." Then they offered her in sacrifice, but not with good-will.

2:72. Remember ye slew a man and fell into a dispute among yourselves as to the crime: But Allah was to bring forth what ye did hide.
2:73. So We said: "Strike the (body) with a piece of the (heifer)." Thus Allah bringeth the dead to life and showeth you His Signs: Perchance ye may understand.
2:74. Thenceforth were your hearts hardened: They became like a rock and even worse in hardness. For among rocks there are some from which rivers gush forth; others there are which when split asunder send forth water; and others which sink for fear of Allah. And Allah is not unmindful of what ye do.