Abdur Rahman bin Abza says: We were with Sayyiduna Umar (may Allah be pleased with him), when a man came to him and said: O Commander of the Faithful! We stay for one or two months and do not find water. Sayyiduna Umar (may Allah be pleased with him) said: As for my own case, I will not pray until I find water. Upon hearing this, Sayyiduna Ammar (may Allah be pleased with him) said: O Commander of the Faithful! Do you remember when we were herding camels at such-and-such place and we became in a state of major impurity (janabah)? Sayyiduna Umar (may Allah be pleased with him) said: Yes. Sayyiduna Ammar (may Allah be pleased with him) said: So I lay down in the soil, and when I came to the Prophet Muhammad (peace and blessings be upon him) and mentioned this, he laughed and said: The soil alone would have sufficed you. Then the Prophet (peace and blessings be upon him) struck his palms on the earth, blew into them, and wiped them over his face and some parts of his arms. Upon hearing this, Sayyiduna Umar (may Allah be pleased with him) said: O Ammar! Fear Allah. He said: O Commander of the Faithful! If you wish, I will never mention this again in my life. Sayyiduna Umar (may Allah be pleased with him) said: Never! By Allah, whatever you are willing to take responsibility for, we appoint you responsible for it.