Sunan Abi Dawud — The Rites of Hajj (Kitab Al-Manasik Wa'l-Hajj) — Hadith No: 1731
Translation
Narrated Abdullah ibn Abbas: Ibn Abbas recited this verse: 'It is no sin for you that you seek the bounty of your Lord', and said: The people would not trade in Mina (during the hajj), so they were commanded to trade when they proceeded from Arafat