Moses's People Find the Right Cow
They went out in search of such a cow. The only one that matched the description was the one owned by the orphaned youth. They met him on the way and asked the price for which he would sell his cow. He told them he would have to consult his mother first, so they accompanied him to his house and offered her three gold coins. She refused their offer, saying that the cow was worth much more.

They went on increasing their offer and the mother kept on refusing. Finally they urged the son to speak to his mother to be reasonable. He told them: "I will not sell the cow without my mother's approval, even if you offered me its skin filled with gold!" On hearing this, his mother smiled and said: "Let that be the price: its skin filled with gold." They realized that no other cow would do; they had to have it at any price. They agreed to buy the cow and paid with its skin filled with gold.

The People are Asked to Slaughter a Cow - Qur'anic
Allah the Almighty narrated: And (remember) when Moses said to his people: "Verily, Allah commands you that you slaughter a cow.

They said: "Do you make fun of us?"

He said: "I take Allah's Refuge from being among AlJahileen (the ignorants or the foolish)."

They said: "Call upon your Lord for us that He may make plain to us what it is!"

He said: "He says, 'Verily, it is a cow neither too old nor too young, but (it is) between the two conditions; so do what you are commanded."

They said: "Call upon your Lord for us to make plain to us its color."

He said: "He says, 'It is a yellow cow bright in its color, pleasing to the beholders.

They said: "Call upon your Lord for us to make plain to us what it is. Verily to us all cows are alike, and surely, if Allah wills, we will be guided."

He (Moses) said: "He says, 'It is a cow neither trained to till the soil nor water the fields, sound, having no other color except bright yellow.

They said: "Now you have brought the truth." So they slaughtered it though they were near to not doing it.

And (remember) when you killed a man and fell into dispute among yourselves as to the crime. But Allah brought forth that which you were hiding. So We said: "Strike him (the dead man) with apiece of it (the cow)." Thus Allah brings the dead to life and shows you His Ayat (proofs, evidences, verses, lessons, signs, revelations, etc.) so that you may understand.

Then after that your hearts were hardened and became as stones or even worse in hardness. And indeed, there are stones out of which rivers gush forth, and indeed, there are of them (stones) which fall down for fear of Allah. And Allah is not unaware of what you do. Surah 2: 67-74