50:18

مَّا يَلْفِظُ مِن قَوْلٍ إِلَّا لَدَيْهِ رَقِيبٌ عَتِيدٌ

Transliteration:

Ma yalfithu min qawlin illa ladayhi raqeebun AAateedun

Word by Word:

Not he utters any word but with him (is) an observer ready.

Translations:

not even a word can he utter but there is a watcher with him, ever-present.

Not a word does he utter but there is a sentinel by him, ready (to note it).

He uttereth no word but there is with him an observer ready.

He utters not a word but there is by him a watcher at hand.

Man does not utter any word except that with him is an observer prepared [to record].