What is the source of the statement in the 5th century Syriac version?
The Curetonian Syriac (fifth century C.E.) renders Luke 23:43: "Amen, I say to thee to-day that with me thou shalt be in the Garden of Eden.'"--F. C. Burkitt, "The Curetonian Version of the Four Gospels," Vol.I, Cambridge, 1904.
I got this from here. I forgot to put it in my post above. Glad to help you Blondie.
Where this 5th century Syriac version gets interesting is when you read the Wikipedia article on it: Here.
That makes two quotes in the same paragraph with questionable backgrounds. Doing a little checking helps explain why these two quotes were not source referenced.