The narration reported through this chain from Muhammad ibn Ya‘qub, from Ali ibn Ibrahim, from his father, from Ibn Abi Umayr, from Ibn Udhayna, from Zurara, from one of the Imams عليه السلام: Imam عليه السلام said: "If a traveler does not find water, let him seek it as long as he is within the time (for prayer). If he fears that the time will elapse, then he should perform tayammum and pray at the end of the time. If he later finds water, there is no need for him to repeat the prayer, but he should perform ablution (wudu’) for future prayers."