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.
ibnmajah:508ʿAlī b. Muḥammad > Wakīʿ > Sufyān > Lizāʾidah b. Qudāmah Yā Abū al-Ṣalt Hal

The Prophet got up during the night and went to the toilet and relieved himself, then he washed his face and hands, and went back to sleep. (Sahih) Another chain with similar wording.  

ابن ماجة:٥٠٨حَدَّثَنَا عَلِيُّ بْنُ مُحَمَّدٍ حَدَّثَنَا وَكِيعٌ سَمِعْتُ سُفْيَانَ يَقُولُ لِزَائِدَةَ بْنِ قُدَامَةَ يَا أَبَا الصَّلْتِ هَلْ سَمِعْتَ فِي هَذَا شَيْئًا فَقَالَ حَدَّثَنَا سَلَمَةُ بْنُ كُهَيْلٍ عَنْ كُرَيْبٍ عَنِ ابْنِ عَبَّاسٍ

أَنَّ النَّبِيَّ ﷺ قَامَ مِنَ اللَّيْلِ فَدَخَلَ الْخَلاَءَ فَقَضَى حَاجَتَهُ ثُمَّ غَسَلَ وَجْهَهُ وَكَفَّيْهِ ثُمَّ نَامَ حَدَّثَنَا أَبُو بَكْرِ بْنُ خَلاَّدٍ الْبَاهِلِيُّ حَدَّثَنَا يَحْيَى بْنُ سَعِيدٍ حَدَّثَنَا شُعْبَةُ أَنْبَأَنَا سَلَمَةُ بْنُ كُهَيْلٍ أَنْبَأَنَا بُكَيْرٌ عَنْ كُرَيْبٍ قَالَ فَلَقِيتُ كُرَيْبًا فَحَدَّثَنِي عَنِ ابْنِ عَبَّاسٍ عَنِ النَّبِيِّ ﷺ فَذَكَرَ نَحْوَهُ