“I once asked abu al-Hassan (a.s.), about a man who needs to take Wudu’ for Salah (prayer). However, he is not able to find water. He finds a certain amount of water which is enough for his Wudu’ but it costs one hundred dirham or one thousand dirham. He has that much dirham to buy and take Wudu’, should he buy the water or instead take Tayammum? He (the Imam) said, ‘No, he must buy. This kind of thing has happened to me and I bought water to take Wudu’. What is bought (in this case) is a great deal.’” (For such Ahadith about an act or issue of the five categories of deeds the qualities such as Wujub, (Obligatory), Hurmat (Prohibited), Istihbab (Preference), Kirahat (Detestability) or Ibahah (Permissibility) one must consult fatwas of one’s Mujtahid.)