(CNN) Sen. Rand Paul, who's long been a fierce critic of Hillary Clinton, will call on the former secretary of state to return contributions made from Saudi Arabia to her family's foundation.

In a Friday night speech in New Hampshire, the Kentucky Republican will say there's been a "war on women...in Saudi Arabia" and will urge Clinton to denounce contributions from the country to the Bill, Hillary and Chelsea Clinton Foundation.

"There has been much talk of a war on women. There is indeed a war on women . . . in Saudi Arabia," he will say, according to an excerpt of his prepared remarks. "When Hillary Clinton claims she will support women's rights, ask her why she accepted millions of dollars from (Saudi Arabia)."

Clinton has faced sharp criticism after it was made public earlier this year that the foundation has accepted donations from foreign governments with questionable human rights records.

The foundation banned all donations from foreign governments during Clinton's four-year tenure at the State Department because of conflicts of interest it would pose for the foundation and the Obama administration. When Clinton stepped down in early 2013, the foundation began, once again, to collect donations from foreign governments like Saudi Arabia, the United Arab Emirates and Oman.

Read More