Language:
كتاب التيمم
7  
Rubbing hands and feet with dust (Tayammum)
(7)
Chapter: A Junub can perform Tayammum if he is afraid of disease, death or thirst
(7)
باب إِذَا خَافَ الْجُنُبُ عَلَى نَفْسِهِ الْمَرَضَ أَوِ الْمَوْتَ أَوْ خَافَ الْعَطَشَ، تَيَمَّمَ
Sahih al-Bukhari 346

Narrated Shaqiq bin Salama:

I was with `Abdullah and Abu Musa; the latter asked the former, "O Abu `Abdur-Rahman! What is your opinion if somebody becomes Junub and no water is available?" `Abdullah replied, "Do not pray till water is found." Abu Musa said, "What do you say about the statement of `Ammar (who was ordered by the Prophet (ﷺ) to perform Tayammum). The Prophet (ﷺ) said to him: "Perform Tayammum and that would be sufficient." `Abdullah replied, "Don't you see that `Umar was not satisfied by `Ammar's statement?" Abu- Musa said, "All right, leave `Ammar's statement, but what will you say about this verse (of Tayammum)?" `Abdullah kept quiet and then said, "If we allowed it, then they would probably perform Tayammum even if water was available, if one of them found it (water) cold." The narrator added, "I said to Shaqiq, "Then did `Abdullah dislike to perform Tayammum because of this?" He replied, "Yes."

حَدَّثَنَا عُمَرُ بْنُ حَفْصٍ، قَالَ حَدَّثَنَا أَبِي قَالَ، حَدَّثَنَا الأَعْمَشُ، قَالَ سَمِعْتُ شَقِيقَ بْنَ سَلَمَةَ، قَالَ كُنْتُ عِنْدَ عَبْدِ اللَّهِ وَأَبِي مُوسَى فَقَالَ لَهُ أَبُو مُوسَى أَرَأَيْتَ يَا أَبَا عَبْدِ الرَّحْمَنِ إِذَا أَجْنَبَ فَلَمْ يَجِدْ، مَاءً كَيْفَ يَصْنَعُ فَقَالَ عَبْدُ اللَّهِ لاَ يُصَلِّي حَتَّى يَجِدَ الْمَاءَ‏.‏ فَقَالَ أَبُو مُوسَى فَكَيْفَ تَصْنَعُ بِقَوْلِ عَمَّارٍ حِينَ قَالَ لَهُ النَّبِيُّ صلى الله عليه وسلم ‏ "‏ كَانَ يَكْفِيكَ ‏"‏ قَالَ أَلَمْ تَرَ عُمَرَ لَمْ يَقْنَعْ بِذَلِكَ‏.‏ فَقَالَ أَبُو مُوسَى فَدَعْنَا مِنْ قَوْلِ عَمَّارٍ، كَيْفَ تَصْنَعُ بِهَذِهِ الآيَةِ فَمَا دَرَى عَبْدُ اللَّهِ مَا يَقُولُ فَقَالَ إِنَّا لَوْ رَخَّصْنَا لَهُمْ فِي هَذَا لأَوْشَكَ إِذَا بَرَدَ عَلَى أَحَدِهِمُ الْمَاءُ أَنْ يَدَعَهُ وَيَتَيَمَّمَ‏.‏ فَقُلْتُ لِشَقِيقٍ فَإِنَّمَا كَرِهَ عَبْدُ اللَّهِ لِهَذَا قَالَ نَعَمْ‏.‏
Reference : Sahih al-Bukhari 346
In-book reference : Book 7, Hadith 13
USC-MSA web (English) reference : Vol. 1, Book 7, Hadith 342
  (deprecated numbering scheme)