Is the death of seven Arab princes considered one of the signs of the Day of Judgment, and what is the Hadith narrated concerning that?

A Hadith with this wording or meaning has not been found in the books of السنة (Sunnah), which indicates that it is fabricated. It is not permissible to circulate Hadith widely on the internet without verifying their authenticity. Indeed, the Prophet, peace and blessings be upon him, warned against fabricating Hadith about him, and "It is enough sin for a man to narrate everything he hears." As for the Hadith "If you see him, pledge allegiance to him even if you have to crawl on snow, for he is Allah's Caliph, the Mahdi," its meaning is authentic without the addition "for he is Allah's Caliph, the Mahdi."