A necklace belonging to Asma' was lost, and the Prophet ﷺ sent men in its search. The time for the prayer became due and they were without ablution and they could not find water; therefore they prayed without ablution, They mentioned that to the Prophet ﷺ . Then Allah revealed the Verse of Tayammum. (ʿAisha added: that she had borrowed (the necklace) from Asma').  

هَلَكَتْ قِلاَدَةٌ لأَسْمَاءَ فَبَعَثَ النَّبِيُّ ﷺ فِي طَلَبِهَا رِجَالاً فَحَضَرَتِ الصَّلاَةُ وَلَيْسُوا عَلَى وُضُوءٍ وَلَمْ يَجِدُوا مَاءً فَصَلَّوْا وَهُمْ عَلَى غَيْرِ وُضُوءٍ فَذَكَرُوا ذَلِكَ لِلنَّبِيِّ ﷺ فَأَنْزَلَ اللَّهُ آيَةَ التَّيَمُّمِ زَادَ ابْنُ نُمَيْرٍ عَنْ هِشَامٍ عَنْ أَبِيهِ عَنْ عَائِشَةَ اسْتَعَارَتْ مِنْ أَسْمَاءَ