Kabbalah zu Schemot 31:18

At that time, She is robed in three colours, flaunting Herself before Him with the three colours of Her eyes: white, red and green. At that time, He will say of Her (Song of Songs 6:5): "Turn your eyes away from me, for they overwhelm me!" - they burn me with their flames of your love! [Then Elijah exclaimed:] Sacred Lamp! (Rabbi Shimon), these two eyes are the two precious tablets of Torah, of which it is said (Exodus 31:18): "stone tablets inscribed with the finger of God." They are written on both sides, coloured with twelve shades on this side and twelve shades on the other. These are the twenty-four sides, and it is written (Exodus 32:15) "they were inscribed on one side (zeh) and the other side (zeh)." Zeh is written twice, [and its numerical value (12) doubled is like] the twenty-four books of the Tanach.