Regarding a man who helps someone in a dispute without knowing about the case
باب فِيمَنْ يُعِينُ عَلَى خُصُومَةٍ مِنْ غَيْرِ أَنْ يَعْلَمَ أَمْرَهَا
Sunan Abu Dawood, Book of The Office of the Judge (Kitab Al-Aqdiyah)(view book)
Yahya ibn Rashid said:
We were sitting waiting for Abdullah ibn Umar who came out to us and sat. He then said: I heard the Messenger of Allah ﷺ as saying: If anyone's intercession intervenes as an obstacle to one of the punishments prescribed by Allah, he has opposed Allah; if anyone disputes knowingly about something which is false, he remains in the displeasure of Allah till he desists, and if anyone makes an untruthful accusation against a Muslim, he will be made by Allah to dwell in the corrupt fluid flowing from the inhabitants of Hell till he retracts his statement.
حَدَّثَنَا أَحْمَدُ بْنُ يُونُسَ، حَدَّثَنَا زُهَيْرٌ، حَدَّثَنَا عُمَارَةُ بْنُ غَزِيَّةَ، عَنْ يَحْيَى بْنِ رَاشِدٍ، قَالَ جَلَسْنَا لِعَبْدِ اللَّهِ بْنِ عُمَرَ فَخَرَجَ إِلَيْنَا فَجَلَسَ فَقَالَ سَمِعْتُ رَسُولَ اللَّهِ ﷺ يَقُولُ " مَنْ حَالَتْ شَفَاعَتُهُ دُونَ حَدٍّ مِنْ حُدُودِ اللَّهِ فَقَدْ ضَادَّ اللَّهَ وَمَنْ خَاصَمَ فِي بَاطِلٍ وَهُوَ يَعْلَمُهُ لَمْ يَزَلْ فِي سَخَطِ اللَّهِ حَتَّى يَنْزِعَ عَنْهُ وَمَنْ قَالَ فِي مُؤْمِنٍ مَا لَيْسَ فِيهِ أَسْكَنَهُ اللَّهُ رَدْغَةَ الْخَبَالِ حَتَّى يَخْرُجَ مِمَّا قَالَ " .
Classification
The tradition mentioned above has also been transmitted by Ibn 'Umar from the Prophet ﷺ through different chain of narrators to the same effect. In this version he also said:
"He who assits in a dispute unjustly deserves the anger of Allah, Most High.
حَدَّثَنَا عَلِيُّ بْنُ الْحُسَيْنِ بْنِ إِبْرَاهِيمَ، حَدَّثَنَا عُمَرُ بْنُ يُونُسَ، حَدَّثَنَا عَاصِمُ بْنُ مُحَمَّدِ بْنِ زَيْدٍ الْعُمَرِيُّ، حَدَّثَنِي الْمُثَنَّى بْنُ يَزِيدَ، عَنْ مَطَرٍ الْوَرَّاقِ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، عَنِ النَّبِيِّ ﷺ بِمَعْنَاهُ قَالَ " وَمَنْ أَعَانَ عَلَى خُصُومَةٍ بِظُلْمٍ فَقَدْ بَاءَ بِغَضَبٍ مِنَ اللَّهِ عَزَّ وَجَلَّ " .