(CNN) Jay-Z has partnered with families who have lost sons to police violence, along with fellow activists and attorneys, to take out full-page ads in newspapers across the country to honor George Floyd. #JusticeForGeorgeFloyd," and quotes a passage from a speech made by Dr. Martin Luther King Jr. in Selma, Al. in 1965. "So we're going to stand up amid horses. We're going to stand up right here, amid the belly-clubs.