
It is all in that lost book of the bible, Lizards 8:20-25, which states:
And lo' the Lord did ride the T. Rex, even without a saddle. He rode into Bethlehem and commanded his apostles thusly: "Touch him, touch my dinosaur!" Only Wally, the rarely spoken of thirteenth apostle was brave enough, and as he reached out to touch the mightly lizard, it ate him. After seeing the carnage, Jesus traded in his T. Rex on a Diplodocus.