Found it.
This was reported by one of the recorders of Finney's sermon. It created no small stir among his detractors.
"[A]fter describing the language of the redeemed in heaven as being 'Not unto us, but unto thy name be the glory,'" burst out with the following objectionable language: "We shall see the Restorationists come smoking and fuming out of hell to the gates of heaven, which being opened, they will say, [...] Stand away, you old saints of God! We have paid our own debt! We have a better right here than you! And you too, Jesus Christ, stand one side! Get out of our way! No thanks to you, our being here: we came here on our merits.' . . . Why, sinner, I tell you, if you could climb to heaven, you would hurl God from his throne! Yes, hurl God from his throne! Oh, yes, if you could but get there, you would cut God's throat! Yes, you would cut God's throat!"
Source:
http://www.eaec.org/faithhallfame/charlesfinney.htm#N_10_