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 459
Abu Salih said: It was said that when a man removed gravels from the mosque, they adjured him.
Hadith 460
Abu Hurairah reported (Abu Bakr said that in his opinion he narrated this tradition from the Prophet): The gravels adjure the person when removes them from the mosque.