‘Abdulláh bin Mas’ud said: It was said: ‘O Messenger of Allah ﷺ , how will you recognize Lose whom you have not seen of your Ummah?’ He said: ‘From the blazes on their foreheads and feet, like horses with black and white traces (which make them distinct m others) which are the traces of ablution.’” (Hasan) Another chain with similar wording.