Narrated by Shaykh (Al-Mufid), may Allah سبحانه وتعالى support him, from Abu al-Qasim Ja'far ibn Muhammad, from Muhammad ibn Ya'qub, from Ali ibn Ibrahim, from his father, from Ibn Abi Umayr, from Ibn Udhaynah, from Zurara, from one of the Imams عليه السلام: Imam عليه السلام said: "If a traveler does not find water, he should search for it as long as he is within the time for prayer. If he fears that the time for prayer will pass, then he should perform tayammum and pray at the end of the time. If he later finds water, he does not need to repeat the prayer, but he should perform ablution (wudu) for any subsequent prayers."