Hazrat Saeed bin Musayyib and Hazrat Sha’bi state that if a person performed prayer facing a direction other than the Qiblah, or prayed after performing tayammum, or prayed while there was blood on his clothes, or prayed in a state of major ritual impurity (janabah), and then during or after the prayer time he found water, it is not obligatory for him to repeat the prayer.

Hasan says that if a person finds water, he should perform ghusl, and if he wishes, he may repeat the prayer, and if he wishes, he may not.

Hazrat Hakam bin Aban narrates that Hazrat Ikrimah was with a group and I was with another group. Hazrat Ikrimah’s group did not have water, so they performed tayammum and offered prayer. Then, when they reached the place where there was water, Hazrat Ikrimah said to them,“Do you see the sun over the mountains?”The people replied,“No.”Hazrat Ikrimah said,“Even if you had seen the sun, we would not repeat the prayer because tayammum is sufficient for us.”Then, when I reached the place of Jund, I met Amr bin Muslim, a student of Hazrat Tawus. I mentioned Hazrat Ikrimah’s statement to him, so he went to Hazrat Tawus and mentioned this to him. Then he returned to me and informed me that he had mentioned Ikrimah’s statement to Hazrat Tawus, and he said,“He speaks the truth.”

Hazrat Ibn Sirin says that I was on a journey for Hajj or Umrah, when the last part of the night came, I became junub (in a state requiring ritual purification). We did not have any water, so I performed tayammum and offered the prayer. When the time of Duha (forenoon) came, a man said, "O Abu Bakr! Did you repeat your prayer?" He replied, "If I do not find water for even twenty years, will I repeat the prayer?"

Hazrat Abu Rafi' says that I was praying with my hair braided in plaits. I was in the state of prostration when the Prophet (peace and blessings be upon him) passed by me; he untied my hair, or he forbade me from doing so.

Hazrat Umar bin Khattab and Hazrat Hudhaifah (may Allah be pleased with them) considered it disliked for a person to pray while having his hair tied in plaits.

Hazrat Aban bin Uthman narrates that Hazrat Uthman saw a man who was praying with his hair braided. He said to him that the example of a person who prays with his hair tied is like that of a person who performs prayer with his hands tied.

Hazrat Abu Ishaq says that when Hazrat Ibn Abbas (may Allah be pleased with them) used to pray, his hair would touch the ground.

Hazrat Zaid bin Wahb narrates that Hazrat Abdullah entered the mosque and saw a man performing prayer with his hair tied up. When he finished the prayer, Hazrat Abdullah said, "When you pray, do not tie your hair in braids, because your hair also prostrates with you, and you receive the reward for the prostration of every hair." A man said, "I am afraid that my hair might get scattered." Hazrat Abdullah replied, "Their scattering is better than tying them."

Hazrat Abu Farwah narrates that Hazrat Abdur Rahman used to braid his hair, but when he would pray, he would untie them.