In chapter 4, he discussed Abraham. That man of faith lived before Jehovah gave the Law to Israel and long before Jesus died for our sins.
وَأَحَدُ هٰؤُلَاءِ ٱلْأَشْخَاصِ هُوَ إِبْرَاهِيمُ ٱلَّذِي تَحَدَّثَ عَنْهُ بُولُسُ فِي ٱلْإِصْحَاحِ ٱلرَّابِعِ‏ .‏