Messenger of Allah ﷺ saw a person sitting aloof and not praying with the people. He asked him, "O so and so! What prevented you from offering the prayer with the people?" He replied, "O Messenger of Allah ﷺ! I am Junub and there is no water." The Prophet ﷺ said, "Perform Tayammum with clean earth and that will be sufficient for you." (Using translation from Bukhārī 348)  

أَنَّ رَسُولَ اللهِ ﷺ رَأَى رَجُلًا مُعْتَزِلًا لَمْ يُصَلِّ مَعَ الْقَوْمِ فَقَالَ «يَا فُلَانُ مَا مَنَعَكَ أَنْ تُصَلِّي مَعَ الْقَوْمِ؟» قَالَ يَا رَسُولَ اللهِ أَصَابَتْنِي جَنَابَةٌ وَلَا مَاءَ قَالَ «عَلَيْكَ بِالصَّعِيدِ فَإِنَّهُ يَكْفِيكَ»  

"The Messenger of Allah ﷺ said: 'Clean earth is the Wudu' of the Muslim, even if he does not find water for ten years.'" (Using translation from Nasāʾī 322)  

قَالَ رَسُولُ اللهِ ﷺ «الصَّعِيدُ الطَّيِّبُ وَضُوءُ الْمُسْلِمِ وَإِنْ لَمْ يَجِدِ الْمَاءَ عَشَرَ سِنِينَ»  

"The Messenger of Allah ﷺ sent Usaid bin Hudair and some other people to look for a necklace that 'Aishah had left behind in a place where she had stopped (while traveling). The time for prayer came and they did not have Wudu', and they could not find any water, so they prayed without Wudu'. They mentioned that to the Messenger of Allah ﷺ, and Allah, the Mighty and Sublime revealed the verse of Tayammum. Usaid bin Hudair said: 'May Allah reward you with good, for by Allah, nothing ever happened to you that you dislike, but Allah makes it good for you and the Muslims.'" (Using translation from Nasāʾī 323)   

بَعَثَ رَسُولُ اللهِ ﷺ أُسَيْدَ بْنَ حُضَيْرٍ وَنَاسًا يَطْلُبُونَ قِلَادَةً كَانَتْ عَائِشَةُ نَسِيَتْهَا فِي مَنْزِلٍ نَزَلَتْهُ فَحَضَرَتِ الصَّلَاةُ وَلَيْسُوا عَلَى وُضُوءٍ وَلَمْ يَجِدُوا مَاءً فَصَلَّوْا بِغَيْرِ وُضُوءٍ فَذَكَرُوا ذَلِكَ لِرَسُولِ اللهِ ﷺ فَأَنْزَلَ اللهُ آيَةَ التَّيَمُّمِ فَقَالَ أُسَيْدُ بْنُ حُضَيْرٍ جَزَاكِ اللهُ خَيْرًا فَوَاللهِ مَا نَزَلَ بِكِ أَمْرٌ تَكْرَهِينَهُ إِلَّا جَعَلَ اللهُ لَكِ وَلِلْمُسْلِمِينَ فِيهِ خَيْرَهُ تَمَّ كِتَابُ الطَّهَارَةِ مِنَ الْمُصَنَّفِ بِحَمْدِ اللهِ وَحُسَنِ عَوْنِهِ