Mit jelent a 2Pac hátán lévő kereszt, amibe belen van írva, hogy "Exodus 1831"?

Firstly, is it a reference to the bible verse Exodus 18:31

"Now I know that the LORD is greater than all other gods, for he did this to those who had treated Israel arrogantly."

or secondly, and the one I believe, it is a reference to Nat Turners Slave Revolt in August, 1831 resulting in the death of 56 people