Sunan Abi Dawud 10
سنن أبي داود#10Da'ifحَدَّثَنَا مُوسَى بْنُ إِسْمَاعِيلَ، حَدَّثَنَا وُهَيْبٌ، حَدَّثَنَا عَمْرُو بْنُ يَحْيَى، عَنْ أَبِي زَيْدٍ، عَنْ مَعْقِلِ بْنِ أَبِي مَعْقِلٍ الأَسَدِيِّ، قَالَ نَهَى رَسُولُ اللَّهِ صلى الله عليه وسلم أَنْ نَسْتَقْبِلَ الْقِبْلَتَيْنِ بِبَوْلٍ أَوْ غَائِطٍ . قَالَ أَبُو دَاوُدَ وَأَبُو زَيْدٍ هُوَ مَوْلَى بَنِي ثَعْلَبَةَ .
Narrated Ma'qil ibn AbuMa'qil al-Asadi: The Messenger of Allah (ﷺ) has forbidden us to face the two qiblahs at the time of urination or excretion
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
Al-AlbaniDaif
Muhammad Muhyi Al-Din Abdul HamidMunkar
Shuaib Al ArnautDaif
Zubair Ali ZaiDaif
In-book reference: 1:10