Abu Qatada – may God be pleased with him – said that the Messenger of God – may God’s prayers and peace be upon him – said: “The best of the horses are the most afflicted, the most lumpy, and then the most common lesion. Al-Tirmidhi transmitted it, and he said: This is a good, strange, authentic hadith, and it was included by Ahmad.
Al-Arthem: The mare whose upper lip is white. And the most ulcerated of horses: what has a sore on his forehead, and it is a white that runs in the middle of the forehead. The oath was pronounced: if it was not mahjalla. Shea: every color that contrasts with most of the color of the mare and others, and the plural: shea.