Douglas Harper's Etymology Dictionary
Deo volente
1767, Latin, literally "God willing."
Usage examples of "deo volente".
Like the cat's clavicle, this 'act of God' has survived elsewhere as Deo juvante, Deo volente, ex visitatione Dei from depictions of the supreme god Jove in Roman mythology clutching bolts of lightning, hearkening back to prehistoric man cowering in terror from these flashes splitting the heavens with the voice of thunder to be placated, at any cost to reason, by fabricating privileged relations with the Deity as magic despaired and became religion.