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

يَعْقُوبُ بْنُ خَالِدٍ عَنِ ابْنِ عَبَّاسٍ

tabarani:10821 – Abū al-Zinbāʿ Rawḥ b. al-Faraj al-Miṣrī > ʿAmr b. Khālid al-Ḥarrānī > Ibn Lahīʿah > Yazīd b. ʿAbdullāh b. al-Hād > Ismāʿīl b. Ibrāhīm > Yaʿqūb b. Khālid > Ibn ʿAbbās

[Machine] From the Prophet ﷺ who said, "Performing ablution once is sufficient."  

الطبراني:١٠٨٢١ – حَدَّثَنَا أَبُو الزِّنْبَاعِ رَوْحُ بْنُ الْفَرَجِ الْمِصْرِيُّ ثنا عَمْرُو بْنُ خَالِدٍ الْحَرَّانِيُّ ثنا ابْنُ لَهِيعَةَ عَنْ يَزِيدَ بْنِ عَبْدِ اللهِ بْنِ الْهَادِ عَنْ إِسْمَاعِيلَ بْنِ إِبْرَاهِيمَ عَنْ يَعْقُوبَ بْنِ خَالِدٍ عَنِ ابْنِ عَبَّاسٍ

عَنِ النَّبِيِّ ﷺ قَالَ «الْوُضُوءُ مَرَّةٌ مَرَّةٌ»  

See similar narrations below:

Collected by Bukhārī, Suyūṭī
bukhari:157 – Muḥammad b. Yūsuf > Sufyān > Zayd b. Aslam > ʿAṭāʾ b. Yasār > Ibn ʿAbbās

The Prophet ﷺ performed ablution by washing the body parts only once.  

البخاري:١٥٧ – حَدَّثَنَا مُحَمَّدُ بْنُ يُوسُفَ قَالَ حَدَّثَنَا سُفْيَانُ عَنْ زَيْدِ بْنِ أَسْلَمَ عَنْ عَطَاءِ بْنِ يَسَارٍ عَنِ ابْنِ عَبَّاسٍ قَالَ

تَوَضَّأَ النَّبِيُّ ﷺ مَرَّةً مَرَّةً