Musannaf Ibn Abi Shaybah 34753 — What is recommended and what

Mas'ud bin Hirash (may Allah have mercy on him), the brother of Rib'i bin Hirash (may Allah have mercy on him), said that Sayyiduna Umar (may Allah be pleased with him) asked the people of the tribe of Abs: "Which horse do you find to have the most endurance in your wars?" They replied: "A horse that is red and black in colour, or a brown horse."