Al-Bayhaqi reported: Ibn Abbas, may Allah be pleased with him, confronted the Khawarij, saying, “As for your statement that Ali has delegated ruling to men in the affair of Allah, I recite to you a judgment delegated to men in the matter of the price of a rabbit and other hunted animals. Allah said: O you who believe, do not kill game while you are prepared for pilgrimage… the penalty of which is judged by two men among you. (5:95) I implore you by Allah, is the judgment of men in hunted animals better or their judgment regarding their lives and reconciliation between them? You know that if Allah had willed, he would have judged himself and not delegated it to men. Regarding a woman and her husband, Allah Almighty said: If you fear dissension between them, send a judge from his family and a judge from her family. If they desire reconciliation, Allah will facilitate it between them. (4:35) Hence, Allah has made the judgment of men an established precedent.”
In another narration, Ibn Abbas said, “Allah has made the judgment of men a secured precedent.”
Source: al-Sunan al-Kubrá 15389
Grade: Sahih (authentic) according to Ibn Taymiyyah
عن البيهقي قال ابن عباس رضي الله عنه في الخوارج أَمَّا قَوْلُكُمْ حَكَّمَ الرِّجَالَ فِي أَمْرِ اللَّهِ فَأَنَا أَقْرَأُ عَلَيْكُمْ مَا قَدْ رَدَّ حُكْمَهُ إِلَى الرِّجَالِ فِي ثَمَنِ رُبْعِ دِرْهَمٍ فِي أَرْنَبٍ وَنَحْوِهَا مِنَ الصَّيْدِ فَقَالَ يَأَيُّهَا الَّذِينَ آمَنُوا لا تَقْتُلُوا الصَّيْدَ وَأَنْتُمْ حُرُمٌ إِلَى قَوْلِهِ يَحْكُمُ بِهِ ذَوَا عَدْلٍ مِنْكُمْ فَنَشَدْتُكُمْ بِاللَّهِ أَحُكْمُ الرِّجَالِ فِي أَرْنَبٍ وَنَحْوِهَا مِنَ الصَّيْدِ أَفْضَلُ أَمْ حُكْمُهُمْ فِي دِمَائِهِمْ وَإِصْلاحِ ذَاتِ بَيْنِهِمْ وَأَنْ تَعَلَمُوا أَنَّ اللَّهَ لَوْ شَاءَ لَحَكَمَ وَلَمْ يُصَيِّرْ ذَلِكَ إِلَى الرِّجَالِ وَفِي الْمَرْأَةِ وَزَوْجِهَا قَالَ اللَّهُ عَزَّ وَجَلَّ وَإِنْ خِفْتُمْ شِقَاقَ بَيْنِهِمَا فَابْعَثُوا حَكَمًا مِنْ أَهْلِهِ وَحَكَمًا مِنْ أَهْلِهَا إِنْ يُرِيدَا إِصْلاحًا يُوَفِّقِ اللَّهُ بَيْنَهُمَا فَجَعَلَ اللَّهُ حُكْمَ الرِّجَالِ سُنَّةً مَاضِيَةً
وفي رواية أخرى قال فَجَعَلَ اللَّهُ حُكْمَ الرِّجَالِ سُنَّةً مَأْمُونَةً
15389 السنن الكبرى للبيهقي
8/530 المحدث ابن تيمية خلاصة حكم المحدث إسناده صحيح في منهاج السنة