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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
bayhaqi:14789 – Abū ʿAlī al-Rūdhbārī And ʾAbū al-Ḥusayn b. Bishrān > Ismāʿīl b. Muḥammad al-Ṣaffār > Saʿdān b. Naṣr > Abū Muʿāwiyah > al-Ḥajjāj > Abū Isḥāq > al-Shaʿbī > al-Ḥārith > ʿAlī ؓ

[Machine] If one of the two judges makes a ruling and the other does not, then his ruling is not valid until they both agree.  

البيهقي:١٤٧٨٩ – أَخْبَرَنَا أَبُو عَلِيٍّ الرُّوذْبَارِيُّ وَأَبُو الْحُسَيْنِ بْنُ بِشْرَانَ قَالَا نا إِسْمَاعِيلُ بْنُ مُحَمَّدٍ الصَّفَّارُ نا سَعْدَانُ بْنُ نَصْرٍ نا أَبُو مُعَاوِيَةَ عَنِ الْحَجَّاجِ عَنْ أَبِي إِسْحَاقَ عَنِ الشَّعْبِيِّ عَنِ الْحَارِثِ عَنْ عَلِيٍّ ؓ قَالَ

إِذَا حَكَمَ أَحَدُ الْحَكَمَيْنِ وَلَمْ يَحْكُمِ الْآخَرُ فَلَيْسَ حُكْمُهُ بِشَيْءٍ حَتَّى يَجْتَمِعَا  

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Collected by Suyūṭī
suyuti:4-1252b – ʿAli
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السيوطي:٤-١٢٥٢b –

" عَنْ عَلِىٍّ قَالَ: إِذَا حَكَمَ أحَدُ الحَكَمَيْن وَلَمْ يَحْكُمْ الآخَرُ فَلَيْسَ حُكْمُهُ بِشَىْء يَجْتَمِعَا".  

[ق] البيهقى في السنن