"Homosexuality is an abomination, and the Bible says that homosexuality is a death worthy crime," Lee told WGXA.
The sign references Leviticus 20:13, which reads, "If a man has sexual relations with a man as one does with a woman, both of them have done what is detestable. They are to be put to death; their blood will be on their own heads."
Lee told WGXA that he hoped his sign would have an impact and said he would oppose a Supreme Court decision legalizing gay marriage.
"The institution of marriage was instituted by God and it should not be changed by people who deserve not to live," he said.