Ash-Shama'il Al-Muhammadiyah, Book 39, Hadith 260 (In-Book) ⓘ
Abu Qataadah Radiyallahu 'Anhu relates: "If Rasulullah Sallallahu 'Alayhi Wasallam made an early journey-break in the last portion of the night on his travels, he slept on his right side. If he was staying there till before the morning, he lifted his right arm, put his head on it and slept".
حَدَّثَنَا الْحُسَيْنُ بْنُ مُحَمَّدٍ الْجُرَيْرِيُّ، قَالَ: حَدَّثَنَا سُلَيْمَانُ بْنُ حَرْبٍ، قَالَ: حَدَّثَنَا حَمَّادُ بْنُ سَلَمَةَ، عَنْ حُمَيْدٍ، عَنْ بَكْرِ بْنِ عَبْدِ اللهِ الْمُزَنِيِّ، عَنْ عَبْدِ اللهِ بْنِ رَبَاحٍ، عَنْ أَبِي قَتَادَةَ: أَنَّ النَّبِيَّ صلى الله عليه وسلم، كَانَ إِذَا عَرَّسَ بِلَيْلٍ اضْطَجَعَ عَلَى شِقِّهِ الأَيْمَنِ، وَإِذَا عَرَّسَ قُبَيْلَ الصُّبْحِ نَصَبَ ذِرَاعَهُ، وَوَضَعَ رَأْسَهُ عَلَى كَفِّهِ.
also referenced under: Book 38, Hadith 247 (English)