Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
muslim:2082a – Abū Bakr b. Abū Shaybah > ʿAbdah b. Sulaymān > Hishām b. ʿUrwah from his father > ʿĀʾishah

A'isha reported that the pillow on which Messenger of Allah ﷺ reclined was of leather stuffed with palm fibre.  

مسلم:٢٠٨٢a – حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ حَدَّثَنَا عَبْدَةُ بْنُ سُلَيْمَانَ عَنْ هِشَامِ بْنِ عُرْوَةَ عَنْ أَبِيهِ عَنْ عَائِشَةَ قَالَتْ

كَانَ وِسَادَةُ رَسُولِ اللَّهِ ﷺ الَّتِي يَتَّكِئُ عَلَيْهَا مِنْ أَدَمٍ حَشْوُهَا لِيفٌ  

See similar narrations below:

Collected by Tirmidhī
tirmidhi:2469 – Hannād > ʿAbdah > Hishām b. ʿUrwah from his father > ʿĀʾishah

"The Messenger of Allah ﷺ had a leather cushion stuffed with palm fibres which he would lean on."  

Abū ʿĪsá said that this Ḥadīth is Ṣaḥīḥ.
الترمذي:٢٤٦٩ – حَدَّثَنَا هَنَّادٌ حَدَّثَنَا عَبْدَةُ عَنْ هِشَامِ بْنِ عُرْوَةَ عَنْ أَبِيهِ عَنْ عَائِشَةَ قَالَتْ

كَانَتْ وِسَادَةُ رَسُولِ اللَّهِ ﷺ الَّتِي يَضْطَجِعُ عَلَيْهَا مِنْ أَدَمٍ حَشْوُهَا لِيفٌ  

قَالَ أَبُو عِيسَى هَذَا حَدِيثٌ صَحِيحٌ