50:18
مَّا يَلْفِظُ مِن قَوْلٍ إِلَّا لَدَيْهِ رَقِيبٌ عَتِيدٌ
mā yalfiẓu min qawlin illā ladayhi raqībun ʿatīdun
he does not utter a single word without an ever-present watcher.
Not a word does he (or she) utter but there is a watcher by him ready (to record it).