A man came to Sayyiduna Umar bin Khattab (may Allah be pleased with him) and said, "I am in need of ghusl and have not found water (so what should I do now)?" Upon this, Sayyiduna Ammar bin Yasir said to Sayyiduna Umar bin Khattab (may Allah be pleased with him), "Do you not remember when you and I were on a journey and both of us became junub? You did not pray, but I rolled on the ground and performed the prayer. Then I mentioned this to the Noble Prophet (peace and blessings be upon him), and he said, 'It would have been sufficient for you to do this.' The Prophet (peace and blessings be upon him) struck his hands on the earth, blew on them, and then wiped his face and palms with both hands."