question #1 Sahih Muslim 222b, Book 1, Hadith 439 : How does the imagery of contrasting colors illustrate the rarity or distinctiveness of a group on the Day of Resurrection?

You would be no more among men (on the Day of Resurrection) but like a white hair on (the body of) a black ox, or like a black hair on (the body of) a white ox, and he made no mention of: a strip on the foreleg of an ass.