حَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، عَنْ عَبْدِ الرَّحْمَنِ بْنِ الْقَاسِمِ، عَنْ أَبِيهِ، عَنْ عَائِشَةَ أُمِّ الْمُؤْمِنِينَ، أَنَّهَا قَالَتْ خَرَجْنَا مَعَ رَسُولِ اللَّهِ صلى الله عليه وسلم فِي بَعْضِ أَسْفَارِهِ حَتَّى إِذَا كُنَّا بِالْبَيْدَاءِ - أَوْ بِذَاتِ الْجَيْشِ - انْقَطَعَ عِقْدٌ لِي فَأَقَامَ رَسُولُ اللَّهِ صلى الله عليه وسلم عَلَى الْتِمَاسِهِ وَأَقَامَ النَّاسُ مَعَهُ وَلَيْسُوا عَلَى مَاءٍ وَلَيْسَ مَعَهُمْ مَاءٌ فَأَتَى النَّاسُ إِلَى أَبِي بَكْرٍ الصِّدِّيقِ فَقَالُوا أَلاَ تَرَى مَا صَنَعَتْ عَائِشَةُ أَقَامَتْ بِرَسُولِ اللَّهِ صلى الله عليه وسلم وَبِالنَّاسِ وَلَيْسُوا عَلَى مَاءٍ وَلَيْسَ مَعَهُمْ مَاءٌ ‏.‏ قَالَتْ عَائِشَةُ فَجَاءَ أَبُو بَكْرٍ وَرَسُولُ اللَّهِ صلى الله عليه وسلم وَاضِعٌ رَأْسَهُ عَلَى فَخِذِي قَدْ نَامَ فَقَالَ حَبَسْتِ رَسُولَ اللَّهِ صلى الله عليه وسلم وَالنَّاسَ وَلَيْسُوا عَلَى مَاءٍ وَلَيْسَ مَعَهُمْ مَاءٌ قَالَتْ عَائِشَةُ فَعَاتَبَنِي أَبُو بَكْرٍ فَقَالَ مَا شَاءَ اللَّهُ أَنْ يَقُولَ وَجَعَلَ يَطْعُنُ بِيَدِهِ فِي خَاصِرَتِي فَلاَ يَمْنَعُنِي مِنَ التَّحَرُّكِ إِلاَّ مَكَانُ رَأْسِ رَسُولِ اللَّهِ صلى الله عليه وسلم عَلَى فَخِذِي فَنَامَ رَسُولُ اللَّهِ صلى الله عليه وسلم حَتَّى أَصْبَحَ عَلَى غَيْرِ مَاءٍ فَأَنْزَلَ اللَّهُ تَبَارَكَ وَتَعَالَى آيَةَ التَّيَمُّمِ فَتَيَمَّمُوا ‏.‏ فَقَالَ أُسَيْدُ بْنُ حُضَيْرٍ مَا هِيَ بِأَوَّلِ بَرَكَتِكُمْ يَا آلَ أَبِي بَكْرٍ ‏.‏ قَالَتْ فَبَعَثْنَا الْبَعِيرَ الَّذِي كُنْتُ عَلَيْهِ فَوَجَدْنَا الْعِقْدَ تَحْتَهُ ‏.‏

Yahya related to me from Malik from Abd arRahman ibn al-Qasimfrom his father that A'isha umm al-muminin said, "We went out on ajourney with the Messenger of Allah, may Allah bless him and grant himpeace, and, when we came to Bayda' or Dhat al-Jaysh, a necklace ofmine broke. The Messenger of Allah, may Allah bless him and grant himpeace, stopped to look for it and the people stopped with him. Therewas no water nearby and the people were not carrying any with them, sothey came to Abu Bakr as-Siddiq and said, 'Don't you see what A'ishahas done? She has made the Messenger of Allah, may Allah bless him andgrant him peace, and the people stop when there is no water nearby andthey are not carrying any with them.' " A'isha continued,"Abu Bakr came and the Messenger of Allah, may Allah bless him andgrant him peace, had fallen asleep with his head on my thigh . AbuBakr said, 'You have made the Messenger of Allah, may Allah bless himand grant him peace, and the people stop when there is no water nearbyand they are not carrying any with them ' " She continued,"Abu Bakr remonstrated with me and said whatever Allah willed him tosay, and began to poke me in the waist. The only thing that stopped mefrom moving was that the Messenger of Allah, may Allah bless him andgrant him peace, had his head on my thigh. The Messenger of Allah, mayAllah bless him and grant him peace, slept until morning found himwith no water. Allah, the Blessed and Exalted, sent down the ayat oftayammum and so they did tayammum. Usayd ibn Hudayr said, 'This is notthe first baraka from you, O family of Abu Bakr.'" A'ishaadded, "We roused the camel I had been on and found the necklace underit." Malik was asked whether a man who did tayammum for oneprayer should do tayammum when the time of the next prayer came orwhether the first tayammum was enough. He said, "No, he does tayammumfor every prayer, because he has to look for water for every prayer.If he looks for it and does not find it then he does tayammum." Malik was asked whether a man who did tayammum could lead othersin prayer if they were in wudu. He said, "I prefer that someone elseshould lead them. However, I see no harm in it if he does lead them inprayer." Yahya said that Malik said that a man who didtayammum because he could not find any water, and then stood and saidthe takbir and entered into the prayer, and then someone came withsome water, did not stop his prayer but completed it with tayammum anddid wudu for future prayers. Yahya said that Malik said,"Whoever rises for prayer and does not find water and so does whatAllah has ordered him to do of tayammum has obeyed Allah. Someone whodoes find water is neither purer than him nor more perfect in prayer,because both have been commanded and each does as Allah has commanded.What Allah has commanded as far as wudu is concerned is for the onewho finds water, and tayammum is for the one who does not find waterbefore he enters into the prayer." Malik said that a man whowas in a state of major ritual impurity could do tayammum and read hisportion of Qur'an and do voluntary prayers as long as he did not findany water. This applied only to circumstances in which it wasallowable to pray with tayammum. Translation Not Available

Book Ref: Muwatta Imam Malik Book 2 Hadith 121
Web Ref:  Muwatta Imam Malik Book 2 Hadith 91