(15) باب فِي حَصَى الْمَسْجِدِ
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 !
Reference: Sunan Abi Dawud 458
In-book reference: Book 2, Hadith 68
English translation: Book 2, Hadith 458