next, Moses told to his people that he will leave them to Tur Sina for 30 days, there Allah extended his meeting with ten holy days (the days Muslims go to Hajj and fasting is very much encouraged), at those days some Jews told the others he will not come back to you, but his Lord is this Cow and Moses himself has forgotten this! People were perplexed. Haron tried to stop them but was given the warning that he will be killed if do not stop, so he was also perplexed what to do with those people
people were saying Harun that they will worship the cow until Moses come back and explain what they should do
Moses was at the last times of his meeting with Allah that he was asked what he think about his people? He said they are waiting for him to return and bring them Torah, but Allah let him know what they have done in his absence
Moses came back angrily to his people, asked Harun why he didn't stop them, he said he couldn't and they were almost killing him, Moses said why you didn't came after me to let me know of that? Harun answered because I was afraid you may think I have increased the discrepancy between them
Moses then burned the cow and teared it up in pieces and pour them in the sea
then Samery (the one who was the origin to this Fitnah) was asked how and why he did so? He said I saw from the footprint of the angel Gabriel what the others couldn't see, I took from it and used it in producing the cow so that the sculpture had a voice! THen invited the others to worship it ...
Moses instead of killing him let him go and said to him you will be punished by an illness that no one would get close to you or touch you, and in the hereafter you will be punished more
then the people asked Moses to show them Allah, he said it is not possible but they insisted, so he chose 40 men among all and took them with himself to Tur Sina
then asked Allah what they wanted, Allah inspired to Moses if you can see this light (or the mountain can bear this light, my memory couldn't help me) you will see me either, then a light was emitted to a mountain and it was exploded in powders, the dust now we see floating in the air being half of its matter which never came back to the Earth after that. Moses fall inconcious. Then Allah killed all those people with Moses. Moses cried and said please, this is of course an exam otherwise
you could kill all of us once we were with our people. then asked Allah if you leave them dead people will blame me that I have killed them, and Allah brought all again to life. Then while the mountain was kep on top of their head got a covenant from them not to deny anything that Allah asked them to declare. Then Allah narrates that they didn't go by that covenant and hid what they were not allowed to hide.
That's what I can remember by now, some parts are also in Quran and the other details are in Shia Ahadeeth.