The trial court in Reynolds v. United States gave the following jury charge, which the Supreme Court later found was proper and not inflammatory.
I think it not improper, in the discharge of your duties in this case, that you should consider what are to be the consequences to the innocent victims of this delusion. As this contest goes on, they multiply, and there are pure-minded women and there are innocent children, innocent in a sense even beyond the degree of the innocence of childhood itself. These are to be the sufferers; and as jurors fail to do their duty, and as these cases come up in the Territory of Utah, just so do these victims multiply and spread themselves over the land.
It’s a fascinating snapshot of the ideas and prejudices of the time — Note that polygamy (or is it the church itself?) is referred to as “this delusion.” The jury, not surprisingly, convicted, leading to the Supreme Court’s ruling that the First Amendment did not protect Mormon polygamy.
UPDATE: I should note that Reynolds is a relatively short and readable opinion (among Supreme Court opinions, that is), and even more so with a few quick pointers I’ll give here. The first several pages are dedicated to certain procedural challenges to Reynolds’ conviction which are of essentially no interest now, so non-legal readers will probably want to skip these evidentiary challenges and jury composition challenges, and go to sections 5 and 6 (they’re clearly labeled), which deal with the religion issues. It is fascinating reading.