That appointed him,— Heylin reads, who constituted him [in that office]. The next words are taken from Numbers 12:7. The word house is used, not only for a building, but for such as dwell in it;—a family, a people: And as God is said to dwell among the children of Israel, hence they are called his house; that is, his servants, his people. When the apostle says his house, he does not mean Moses's, but his house who appointed Moses; that is, God's house.
Related Commentaries of Hebrews 3:2
Hebrews 3:2
2 Who was faithful to him that appointeda him, as also Moses was faithful in all his house.