Every person has two angels assigned to him— one on his right who records his good deeds, and one on his left who records his bad deeds.

إِذۡ يَتَلَقَّى ٱلۡمُتَلَقِّيَانِ عَنِ ٱلۡيَمِينِ وَعَنِ ٱلشِّمَالِ قَعِيدٞ

(Remember!) that the two receivers (recording angels) receive (each human being after he or she has attained the age of puberty), one sitting on the right and one on the left (to note his or her actions).

مَّا يَلۡفِظُ مِن قَوۡلٍ إِلَّا لَدَيۡهِ رَقِيبٌ عَتِيدٞ

Not a word does he (or she) utter, but there is a watcher by him ready (to record it). Qaf 50:17-18

These angels are the keepers and protectors who remain with a person during travel and residence, in all of his states: during his prayer, his prostration, and throughout his daily life. They do not leave him except during private moments, such as when he is relieving himself. They are constantly recording a person’s words and actions.

Shaykh Fawzan’s Muhaadaraat fee al-Aqeedah wa ad-Da’wa v.1 pg.275-276