Unto my brethren (tois adelphois mou). To prove his point the writer quotes Psa 22:22 when the Messiah is presented as speaking “unto my brethren.”
Congregation (ekklēsias). The word came to mean the local church and also the general church or kingdom (Mat 16:18; Heb 12:23). Here we have the picture of public worship and the Messiah sharing it with others as we know Jesus often did.