Musannaf Ibn Abi Shaybah

It is narrated from Hazrat Uqbah that he departed from Muzdalifah with Hazrat Husain bin Ali (may Allah be pleased with him). He did not walk fast. When they reached the valley of Muhassir, he said: "Raise your voices loudly, spur with your feet, strike the mount with the whip, and hasten out of the valley," until the ground became level and they had exited the valley of Muhassir.