The Messenger of Allah ﷺ said, "The entire earth has been made a place of prayer for us, and its soil has been made a means of purification for us when we do not find water." Abridged.
قال رسول الله ﷺ: جعلت لنا الأرض كلها مسجدا، وجعلت تربتها لنا طهورا إذا لم نجد الماء. مختصرا.