Al-Kāfi - Volume 7 > Adjudication Disciplines
Hadith #4

4- وَبِهَذَا الإسْنَادِ أَنَّ رَجُلا نَزَلَ بِأَمِيرِ الْمُؤْمِنِينَ (عَلَيْهِ السَّلام) فَمَكَثَ عِنْدَهُ أَيَّاماً ثُمَّ تَقَدَّمَ إِلَيْهِ فِي خُصُومَةٍ لَمْ يَذْكُرْهَا لأمِيرِ الْمُؤْمِنِينَ (عَلَيْهِ السَّلام) فَقَالَ لَهُ أَخَصْمٌ أَنْتَ قَالَ نَعَمْ قَالَ تَحَوَّلْ عَنَّا إِنَّ رَسُولَ اللهِ (صَلَّى اللهُ عَلَيْهِ وَآلِه) نَهَى أَنْ يُضَافَ الْخَصْمُ إِلا وَمَعَهُ خَصْمُهُ.

4. Through the same chain of narrators as that of the previous Hadith, the following is narrated: “A man once became a guest of ’Amir al-Mu’minin, Ali, ‘Alayhi al-Salam, and stayed with him for several days. He then presented a case before him (the Imam) for adjudication, which he had not mentioned to him (the Imam) before. He (the Imam) asked, ‘Are you the plaintiff?’ The man replied, ‘Yes, I am the plaintiff.’ He (the Imam) said, ‘You must move in another place for lodging; the Messenger of Allah, O Allah, grant compensation to Muhammad and his family worthy of their services to Your cause, has prohibited entertaining a plaintiff as a guest without the presence of the defendant.’”