Fiqh-us-Sunnah Volume 5, Hajj and ‘Umrah, Fiqh 5.098.

Section : Spending the Day at Arafah – An Abrahamic Tradition.

Mirba’ Al-Ansari reported that the Prophet (peace be upon him) said: “You must azhere to the traditions and rituals (of Hajj), for these have come down to you from (your forefather) Ibrahim in heritage.” This was reported by Tirmizhi as a sound hadith.