Ghadir Khumm, Where Religion Was Brought to Perfection

We notice that while Ali bin Abi Talib after fulfilling his mission at Yemen was with great enthusiasm, making arrangements for his journey to Mecca. The Holy Prophet, on the other hand, was busy in the preparations necessary for performing the obligatory statute of pilgrimage.
The Prophet of God had not offered pilgrimage after his emigration to Medina. All of a sudden the good news spread that the Messenger of God was proceeding towards the sacred city of Mecca. In order to avail the opportunity of accompanying the Prophet people from every corner of Arabia thronged in multitude. Within no time tents of more than 100,000 people desirous of pilgrimage were seen planted in the environs of the city of Medina.