Surah Qaf 50:16

وَلَقَدْ خَلَقْنَا ٱلْإِنسَـٰنَ وَنَعْلَمُ مَا تُوَسْوِسُ بِهِۦ نَفْسُهُۥ ۖ وَنَحْنُ أَقْرَبُ إِلَيْهِ مِنْ حَبْلِ ٱلْوَرِيدِ

And We have already created man and know what his soul whispers to him, and We are closer to him than [his] jugular vein.

Translation: Saheeh International

Tafsir

And verily We created man and We know wa-na‘lamu is a circumstantial qualifier with an implicit preceding nahnu what mā relates to the verbal action his soul whispers to him what it speaks to him the bi- of bihi ‘him’ is extra or it is required for the intransitive verb to become transitive and take a direct object; …

Excerpt from Tafsir al-Jalalayn, commentary on 50:16, via Quran.com. The reader has the full commentary and 9 more tafsirs.