Muhammad ibn Ahmad, from Ahmad ibn Al-Hasan, from Amr ibn Sa’id, from Musaddiq ibn Sadaqah, from Ammar Al-Sabati, narrated from Abu Abdullah عليه السلام: Imam عليه السلام was asked about a man who has only one garment, in which prayer is not permissible, and he does not find water to wash it. What should he do? Imam عليه السلام said: "He should perform tayammum (dry ablution) and pray. Then, when he finds water, he should wash it and repeat the prayer."