Taking money out of IRA for first time home purchase question?

I want to take money out of an ira. I wont receive the funds in time before my home closes though. I know I get a first time 10k no penalty take out for my first home. Can I use my own money then take the 10k and replace it in the bank after I close on the home? Do I have to show a money trail to get the 10k non penalized?