Taken from Faza'il - e- A'maal by Shaikhul Hadith Maulana Muhammed Zakariyya RA... I sincerely hope that this does not infringe any copyrights

Surah Al Maa-idah"This day I have perfected your religion for you; completed my favour upon you;and have chosen for you islam as your religion"

Oce a learned person from amongst the Jews said to Umar (R.A). :" In the Qur'aan you people read a certain vers. If that verse had been revealed to us, we would have celebrated that day annually." Umar R.A. inquired: "which verse is that?" He replied: "Al Yowma Akmaltu Lakum Deenakum." (The verse from Surah Maa-idaah quoted above) Umar (R.A.) said: "Verily I remember the day and place where this verse was revealed (and apart from the revelation of this verse, which was on a Friday) it was already a double celebration for us. Firstly it was Friday --- A day of celebration for all Muslims, and secondly, it was the day of Arafaat --- a day of celebration for pilgrams. Umar (R.A.) further stated that this verse was revealed on a Friday after As'r on the day of Arafaat while Rasulullah (SAW) was seated on his she camel. It is further stated in the hadith that no further verses were revealed after this one with regards to halaal and haraam.
The camel was forced to sit down because of the great weight ascending upon it on account of the revelation. This is what normally happened. Aa'sha (R.A) states that, when Rasulullah (SAW) was seated on a camel, the camel used to lower its neck being unable to lift it or move a step until revelation had ended. Abdullah ibn Umar (R.A) relatees from Rasulullah (SAW)that when revelation descended upon him he feared that he would lose his life. (Durre Manthoor) Zaid ibn Thabit (R.A) stated that when the verse 95 in Surah 4 was being revealed I was sitting next to Rasulullah (SAW). Rasulullah (SAW) then became like one in a state of semi- consciousness, and he put his thigh upon mine, the weight of which was so great that i felt that my leg would break.(Durre Manthoor) This was due to the greatness of Allah's words, which we nowadays read very casually and superficially as though it were ordinary speech.