GOP Sen. Rand PaulRandal (Rand) Howard PaulGOP leader blocks resolution backing intelligence community on Russia Rand Paul blocks Sanders's Russia resolution, calls it 'crazy hatred' against Trump McCain: Trump plays into 'Putin's hands' by attacking Montenegro, questioning NATO obligations MORE (Ky.) on Saturday blasted President Obama's decision to endorse same-sex marriage, mocking the president's claim that the announcement was the result of years of personal reflection.

“Call me cynical, but I wasn’t sure his views on marriage could get any gayer,” said Paul, in remarks to the Iowa Faith & Freedom Coalition dinner, first reported by the Des Moines Register.

"It did kind of bother me though that he used the justification for it in a biblical reference," Paul continued. "He said the biblical golden rule caused him to be for gay marriage. And I'm like what version of the Bible is he reading… I don't know what version he's getting it from."

President Obama last week became the first sitting U.S. president to openly support gay marriage. Obama had previously backed civil unions, while describing his views on marriage as "evolving."

Many Republicans however said the announcement was politically motivated as the administration faced increasing pressure from pro-gay rights supporters and after Vice President Biden publicly backed same-sex marriage in an interview on NBC's "Meet the Press."

Paul said conservatives needed to defend the definition of traditional marriage.

"That doesn't mean we need to be harsh and mean and hate people," said Paul. "But that doesn't mean that we have to go ahead and give up our traditions. We've got 6,000 years of tradition."