﴿ وَلَقَدْ خَلَقْنَا ٱلْإِنسَٰنَ وَنَعْلَمُ مَا تُوَسْوِسُ بِهِۦ نَفْسُهُۥ ۖ وَنَحْنُ أَقْرَبُ إِلَيْهِ مِنْ حَبْلِ ٱلْوَرِيدِ ﴾

“NOW, VERILY, it is We who have created man, and We know what his innermost self whispers within him: for We are closer to him than his neck-vein.”

Please check ayah 50:22 for complete tafsir.