In Qur'an, there is a principle for all the disputed issues

Hawzah News Agency - Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad from ibn Faddal from Al-Thaqafi‘laba ibn Maymun from one he narrated from al-Mu‘alla ibn Khunays who has said the following. “Abu ‘Abdallah has said,

مَا مِنْ أَمْرٍ يَخْتَلِفُ فِيهِ اثْنَانِ إِلا وَلَهُ أَصْلٌ فِي كِتَابِ الله عَزَّ وَجَلَّ وَلَكِنْ لا تَبْلُغُهُ عُقُولُ الرِّجَالِ.

‘There is no issue which would be disputed between two people but that there is a principle for it in the book of Allah, the Most Majestic, the Most Glorious, only the man’s power of Intelligence is not able to reach it.’”

Al-Kāfi, v.1, Book 2, Chapter 20