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
suyuti:12139a –
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السيوطي:١٢١٣٩a –

"الوُضُوءُ مِمَّا خَرَجَ، وَلَيسَ مِمَّا دَخَلَ".  

[حل] أبى نعيم في الحلية [ق] البيهقى في السنن وضَعَّفَه عن ابن عباس

See similar narrations below:

Collected by Bayhaqī, Suyūṭī
bayhaqi:731 – Abū ʿAlī al-Rūdhbārī > Abū al-Naḍr al-Faqīh > ʿUthmān b. Saʿīd al-Dārimī > Muḥammad b. Kathīr al-ʿAbdī > Isrāʾīl > ʿAbd al-Aʿlá > Abū ʿAbd al-Raḥman > ʿAlī > Ṭaʿim Khubz And Laḥm Faqīl Lah Alā Tatawaḍḍaʾ

[Machine] Indeed, ablution is from what has exited, not from what has entered.  

البيهقي:٧٣١ – أَخْبَرَنَا أَبُو عَلِيٍّ الرُّوذْبَارِيُّ ثنا أَبُو النَّضْرِ الْفَقِيهُ ثنا عُثْمَانُ بْنُ سَعِيدٍ الدَّارِمِيُّ ثنا مُحَمَّدُ بْنُ كَثِيرٍ الْعَبْدِيُّ ثنا إِسْرَائِيلُ عَنْ عَبْدِ الْأَعْلَى عَنْ أَبِي عَبْدِ الرَّحْمَنِ عَنْ عَلِيٍّ ؓ أَنَّهُ طَعِمَ خُبْزًا وَلَحْمًا فَقِيلَ لَهُ أَلَا تَتَوَضَّأُ فَقَالَ

إِنَّ الْوُضُوءَ مِمَّا خَرَجَ وَلَيْسَ مِمَّا دَخَلَ