Sunan Abi Dawud 7
سنن أبي داود#7Sahihحَدَّثَنَا مُسَدَّدُ بْنُ مُسَرْهَدٍ، حَدَّثَنَا أَبُو مُعَاوِيَةَ، عَنِ الأَعْمَشِ، عَنْ إِبْرَاهِيمَ، عَنْ عَبْدِ الرَّحْمَنِ بْنِ يَزِيدَ، عَنْ سَلْمَانَ، قَالَ قِيلَ لَهُ لَقَدْ عَلَّمَكُمْ نَبِيُّكُمْ كُلَّ شَىْءٍ حَتَّى الْخِرَاءَةَ . قَالَ أَجَلْ لَقَدْ نَهَانَا صلى الله عليه وسلم أَنْ نَسْتَقْبِلَ الْقِبْلَةَ بِغَائِطٍ أَوْ بَوْلٍ وَأَنْ لاَ نَسْتَنْجِيَ بِالْيَمِينِ وَأَنْ لاَ يَسْتَنْجِيَ أَحَدُنَا بِأَقَلَّ مِنْ ثَلاَثَةِ أَحْجَارٍ أَوْ يَسْتَنْجِيَ بِرَجِيعٍ أَوْ عَظْمٍ .
Narrated Salman al-Farsi: It was said to Salman: Your Prophet teaches you everything, even about excrement. He replied: Yes. He has forbidden us to face the qiblah at the time of easing or urinating, and cleansing with right hand, and cleansing with less than three stones, or cleansing with dung or bone
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:
In-book reference: 1:7