Besides this direct knowledge ,We have assigned to every one two scribes (guardian angels), the one seated on his right and the other on his left
Dr. Munir Munshey
(Remember)! The two sentries, (the two angels responsible for recording deeds), _ one sitting on the right (shoulder), the other on the left _ are receiving (and recording everything)
Dr. Kamal Omar
When the two Receivers (imposed angels) receive from the right and from the left in sitting posture
(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)
Two recording forces record from his right and from his left!
Al-muntakhab fi tafsir al-Qur'an al-Karim
Two angels sit as receivers by his sides, right and left, to take delivery of all that he advances of actions with reference to rendering an account of his life and conduct to Allah