What four things were required of believers at the Council of Jerusalem?

That they abstain from eating meat offered to idols, from blood, from things that are strangled, and from fornication.

It seemed good to the Holy Ghost, and to us, to lay upon you no greater burden than these necessary things;

That ye abstain from meats offered to idols,

and from blood,

and from things strangled,

and from fornication. Acts 15:28-29