Surah Ali 'Imran 3:7

هُوَ ٱلَّذِىٓ أَنزَلَ عَلَيْكَ ٱلْكِتَـٰبَ مِنْهُ ءَايَـٰتٌ مُّحْكَمَـٰتٌ هُنَّ أُمُّ ٱلْكِتَـٰبِ وَأُخَرُ مُتَشَـٰبِهَـٰتٌ ۖ فَأَمَّا ٱلَّذِينَ فِى قُلُوبِهِمْ زَيْغٌ فَيَتَّبِعُونَ مَا تَشَـٰبَهَ مِنْهُ ٱبْتِغَآءَ ٱلْفِتْنَةِ وَٱبْتِغَآءَ تَأْوِيلِهِۦ ۗ وَمَا يَعْلَمُ تَأْوِيلَهُۥٓ إِلَّا ٱللَّهُ ۗ وَٱلرَّٰسِخُونَ فِى ٱلْعِلْمِ يَقُولُونَ ءَامَنَّا بِهِۦ كُلٌّ مِّنْ عِندِ رَبِّنَا ۗ وَمَا يَذَّكَّرُ إِلَّآ أُو۟لُوا۟ ٱلْأَلْبَـٰبِ

It is He who has sent down to you, [O Muḥammad], the Book; in it are verses [that are] precise - they are the foundation of the Book - and others unspecific. As for those in whose hearts is deviation [from truth], they will follow that of it which is unspecific, seeking discord and seeking an interpretation [suitable to them]. And no one knows its [true] interpretation except Allāh. But those firm in knowledge say, "We believe in it. All [of it] is from our Lord." And no one will be reminded except those of understanding.

Translation: Saheeh International

Tafsir

He it is Who revealed to you the Book wherein are verses that are clear lucid in proof forming the Mother Book the original basis for rulings and others allegorical whose meanings are not known such as the opening verses of some sūras. …

Excerpt from Tafsir al-Jalalayn, commentary on 3:7, via Quran.com. The reader has the full commentary and 9 more tafsirs.