And above all of them, the hand writes, and below all of them, the hand signs. It is this that is written: (Job 37:7) And by the hand of every man he seals...
A hand writes – the Written Torah, which is to the right, a hand signs – the Oral Torah, which is to the left.
About the written Torah, which is to the right, it is stated: (Ex. 14:8)... and the Children of Israel came out with a high hand... – and this is the Middle Pillar, which is the Torah that was given from the right-hand, for Ḥokhmah is there.