Surah Al-An'am 6:153

وَأَنَّ هَـٰذَا صِرَٰطِى مُسْتَقِيمًا فَٱتَّبِعُوهُ ۖ وَلَا تَتَّبِعُوا۟ ٱلسُّبُلَ فَتَفَرَّقَ بِكُمْ عَن سَبِيلِهِۦ ۚ ذَٰلِكُمْ وَصَّىٰكُم بِهِۦ لَعَلَّكُمْ تَتَّقُونَ

And, [moreover], this is My path, which is straight, so follow it; and do not follow [other] ways, for you will be separated from His way. This has He instructed you that you may become righteous.

Translation: Saheeh International

Tafsir

And that read anna with lām of li-anna ‘because’ being implied or inna as beginning a new sentence this that I have charged you with is My straight path mustaqīman ‘straight’ is a circumstantial qualifier so follow it; …

Excerpt from Tafsir al-Jalalayn, commentary on 6:153, via Quran.com. The reader has the full commentary and 9 more tafsirs.