I saw people fighting in 'Arafah. What is the ruling on what they did, and does it affect their Hajj?

Question:
He asks and says: I saw people fighting in 'Arafah. What is the ruling on what they did? And does it affect their Hajj?

Answer:
There is no doubt that this is a major evil. Allah (Exalted and Majestic is He) says: Mere argument that yields no benefit, or that stirs up anger and hatred in the hearts of the arguers toward one another, is forbidden in Hajj and elsewhere. However, in Hajj it is more severe, because the one in ihram is engaged in worship, especially at the most noble of stations, which is the standing at 'Arafah. Therefore, it is a manifest evil, and it affects their Hajj, but it does not invalidate the Hajj. However, there is sin in it, and they must repent to Allah (Mighty and Majestic) and forgive one another. Yes.