UNITED NATIONS — In a show of unity by the world powers against the Islamic State, the United Nations Security Council is preparing to adopt a legally binding resolution intended to choke the terrorist group’s ability to trade in oil, antiquities and hostages.

The draft resolution, which was scheduled to be discussed by Council members in a closed meeting Friday afternoon, requires all 193 member states of the United Nations to prevent the sale of antiquities from Syria, similar to a measure the Council passed 10 years ago regarding antiquities from Iraq.

It also calls for sanctions against those who help the banned terrorist organization produce and smuggle oil out of Syria, and reminds all countries around the world that it is already illegal to pay the group ransom in exchange for hostages. The draft resolution was obtained by The New York Times on Friday.

In a measure of rare consensus among world powers about the need to confront the Islamic State, the draft resolution was proposed by Russia and backed by the United States and other Western powers. The Russian ambassador to the United Nations, Vitaly I. Churkin, said Friday afternoon that he expected it to be adopted next week.