[Machine] The Messenger of Allah ﷺ said, "Do not perform ablution in the desert unless you cannot find any shelter. If you cannot find any shelter, then one of you should draw a line like a boundary, then call upon Allah the Exalted and perform ablution with it." Abu Bakr bin Muhammad informed us, "I am Abu Al-Hasan Al-Fasawi," Abu Ali Al-Lu'lu'i informed us, and Abu Dawud mentioned it.  

قَالَ رَسُولُ اللهِ ﷺ لَا تَغْتَسِلُوا فِي الصَّحْرَاءِ إِلَّا أَنْ لَا تَجِدُوا مُتَوَارًى فَإِنْ لَمْ تَجِدُوا مُتَوَارًى فَلْيَخُطَّ أَحَدُكُمْ خَطًّا كَالدَّارَةِ ثُمَّ يُسَمِّي اللهَ تَعَالَى وَيَغْتَسِلُ فِيهَا أَخْبَرَنَا أَبُو بَكْرِ بْنُ مُحَمَّدٍ أَنَا أَبُو الْحَسَنِ الْفَسَوِيُّ ثنا أَبُو عَلِيٍّ اللُّؤْلُئِيُّ ثنا أَبُو دَاوُدَ فَذَكَرَهُ