Sunan an-Nasa'i 310
It was narrated that 'Aishah said:
"We went out with the Messenger of Allah (ﷺ) on one of his journeys, and when we were in Al-Baida' or Dhat Al-Jaish, a necklace of mine broke and fell. The Messenger of Allah (ﷺ) stayed there looking for it and the people stayed with him. There was no water near them, and they did not have water with them. The people came to Abu Bakr, may Allah be pleased with him, and said: 'Do you see what 'Aishah has done? She has made the Messenger of Allah (ﷺ) and the people stop and they are not near any water and they do not have water with them.' Abu Bakr, may Allah be pleased with him, came while the Messenger of Allah (ﷺ) was resting his head on my thigh and had gone to sleep. He said: 'You have detained the Messenger of Allah (ﷺ) and the people, and they are not near any water and they do not have any water with them.'"
 'Aishah said: "Abu Bakr rebuked me and said whatever Allah willed he would say. He started poking me on my hip, and the only thing that prevented me from moving was the fact that the Messenger of Allah (ﷺ) was resting on my thigh. The Messenger of Allah (ﷺ) slept until morning when he woke up without any water. Then Allah, the Mighty and Sublime revealed the verse of Tayammum. Usaid bin Hudair said: 'This is not the first time we have been blessed because of you, O family of Abu Bakr!'" She said: "Then we made the camel that I had been riding stand up, and we found the necklace beneath it."
أَخْبَرَنَا قُتَيْبَةُ، عَنْ مَالِكٍ، عَنْ عَبْدِ الرَّحْمَنِ بْنِ الْقَاسِمِ، عَنْ أَبِيهِ، عَنْ عَائِشَةَ، قَالَتْ خَرَجْنَا مَعَ رَسُولِ اللَّهِ صلى الله عليه وسلم فِي بَعْضِ أَسْفَارِهِ حَتَّى إِذَا كُنَّا بِالْبَيْدَاءِ أَوْ ذَاتِ الْجَيْشِ انْقَطَعَ عِقْدٌ لِي فَأَقَامَ رَسُولُ اللَّهِ صلى الله عليه وسلم عَلَى الْتِمَاسِهِ وَأَقَامَ النَّاسُ مَعَهُ وَلَيْسُوا عَلَى مَاءٍ وَلَيْسَ مَعَهُمْ مَاءٌ فَأَتَى النَّاسُ أَبَا بَكْرٍ - رضى الله عنه - فَقَالُوا أَلاَ تَرَى مَا صَنَعَتْ عَائِشَةُ أَقَامَتْ بِرَسُولِ اللَّهِ صلى الله عليه وسلم وَبِالنَّاسِ وَلَيْسُوا عَلَى مَاءٍ وَلَيْسَ مَعَهُمْ مَاءٌ ‏.‏ فَجَاءَ أَبُو بَكْرٍ - رضى الله عنه - 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 وَقَالَ مَا شَاءَ اللَّهُ أَنْ يَقُولَ وَجَعَلَ يَطْعُنُ بِيَدِهِ فِي خَاصِرَتِي فَمَا مَنَعَنِي مِنَ التَّحَرُّكِ إِلاَّ مَكَانُ رَسُولِ اللَّهِ صلى الله عليه وسلم عَلَى فَخِذِي فَنَامَ رَسُولُ اللَّهِ صلى الله عليه وسلم حَتَّى أَصْبَحَ عَلَى غَيْرِ مَاءٍ فَأَنْزَلَ اللَّهُ عَزَّ وَجَلَّ آيَةَ التَّيَمُّمِ ‏.‏ فَقَالَ أُسَيْدُ بْنُ حُضَيْرٍ مَا هِيَ بِأَوَّلِ بَرَكَتِكُمْ يَا آلَ أَبِي بَكْرٍ ‏.‏ قَالَتْ فَبَعَثْنَا الْبَعِيرَ الَّذِي كُنْتُ عَلَيْهِ فَوَجَدْنَا الْعِقْدَ تَحْتَهُ ‏.‏