Found it

"...even though some are now probably calling me a heretic--this truth is very detrimental to their treasury--I do not pay much attention to their bawling, for their reactions are those of clouded minds that never got a sniff of Scripture, never read the Christian teachers, never understood their own teachers, but are almost decayed in their riddled and mangled opinions. If they had understood these, they would know they ought to defame no man unheard and unchallenged. But may God give them and us right understanding. Amen."

Martin Luther, A Sermon On Indulgence and Grace, 1518

and this also, from the introduction to the book that that is from:

"...a bull was drawn up threatening Luther with excommunication. The bull was prnted in complete form in June 1520, sent to Germany, and distributed in the fall. On 10 December Luther burned the bull at the Elster Gate in Wittenberg. This happened after papal representatives in many places had already commited Luther's writings to the faggots with due ceremony. The significance we attach to Luther's act today is far different from what his contemporaries thought. To them the really provocative act on 10 December 1520 was Luther's burning of the books of canon law, together with the writings of the Scholastic theologians and his Roman opponents."

Tis rad. Tis rad.