Hadith 458
Abu al-Walid said: I asked Ibn Umar about the gravel spread pin the mosque. He replied: One night the rain fell and the earth was moistened. A man was bringing the gravel (broken stones) in his cloth and spreading it beneath him. When the Messenger of Allah ﷺ finished his prayer, he said: How fine it is!
Hadith 4285
Narrated Abu Saeed al-Khudri: The Prophet ﷺ said: The Mahdi will be of my stock, and will have a broad forehead a prominent nose. He will fill the earth will equity and justice as it was filled with oppression and tyranny, and he will rule for seven years.