Al Quran : And We are nearer to him than his jugular vein (by Our Knowledge).

Bismillahirrahmanirrahim

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وَلَقَدْ خَلَقْنَا الْإِنسَانَ وَنَعْلَمُ مَا تُوَسْوِسُ بِهِ نَفْسُهُ ۖ وَنَحْنُ أَقْرَبُ إِلَيْهِ مِنْ حَبْلِ الْوَرِيدِ

إِذْ يَتَلَقَّى الْمُتَلَقِّيَانِ عَنِ الْيَمِينِ وَعَنِ الشِّمَالِ قَعِيدٌ

مَّا يَلْفِظُ مِن قَوْلٍ إِلَّا لَدَيْهِ رَقِيبٌ عَتِيدٌ

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✦ Al Quran : And indeed We have created man, and We know what his ownself whispers to him. And We are nearer to him than his jugular vein (by Our Knowledge). (Remember) that the two receivers (recording angels) receive (each human being), one sitting on the right and one on the left (to note his or her actions). Not a word does he (or she) utter but there is a watcher by him ready (to record it).

Surah Qaf (50), 16-19