WHEN THE PROPHET STRUCK CAMP H 975 "On a journey, the Prophet, praise and peace be upon him, would strike camp in the latter part of the night and lie down on his right side. If he halted a little before dawn he would stretch out, raise his arm would rest his head on his palm." R 975 Muslim with a chain up to Abu Khatadah who related this.
963- وعن أَبي قتادة رضي الله عنه ، قَالَ : كَانَ رسولُ الله صلى الله عليه وآله وسلم إِذَا كَانَ فِي سَفَرٍ ، فَعَرَّسَ بِلَيْلٍ اضْطَجَعَ عَلَى يَمِينهِ ، وَإِذَا عَرَّسَ قُبَيلَ الصُّبْحِ نَصَبَ ذِرَاعَهُ ، وَوَضَعَ رَأسَهُ عَلَى كَفِّهِ . رواه مسلم . قَالَ العلماءُ : إنَّمَا نَصَبَ ذِرَاعَهُ لِئَلاَّ يَسْتَغْرِقَ في النَّومِ ، فَتَفُوتَ صَلاَةُ الصُّبْحِ عَنْ وَقْتِهَا أَوْ عَنْ أوَّلِ وَقْتِهَا .