Goldfish often don't make the transition from a larger pond to a smaller tank successfully.
How large is the pond?
What size and type of goldfish are the fish?
How many do you plan to move to the tank?
Is there a time limitation?
Any way you can run the tank filter on the pond?
If so, run it on there one month to cycle it then transfer it, with the fish, to the tank.
If this is not possible;
I would set the tank up, using pond water, then add the filter and a fish or two to cycle for one month, then add another couple of fish. A lot depends on the answers to the above questions.