The Lord is described as a king taking a royal census and registering individual names (“this one … that one …”), but the remarkable thing is that these people are Gentiles and that God is making them His own children and citizens of His Holy City! Even more, the nations named are the avowed enemies of the Jews! The emphasis in all three verses is on birth, indicating that the people who enter the future glorious kingdom will experience a “new birth” and belong to the family of God. Like Paul, they will be citizens by birth (Acts 22:25–29) and not by purchase. The phrase “them that know me” indicates more than an intellectual appreciation of the Lord. It describes a personal relationship with Him, like that of husband and wife (Gen. 4:1; 19:8; 1 Sam. 2:12; 3:7).
“Rahab” refers to Egypt (89:10; Isa. 51:9), Israel’s enemy in the south, and the word means “arrogant, boisterous.” Egypt enslaved the Jews and yet will share with them citizenship in the city of God and membership in the family of God (Isa. 19:18–25)! Israel’s northern enemy, Babylon, would one day destroy Jerusalem and ravage the kingdom of Judah, and the Jews would vow to pay her back (137:1, 8–9), but she, too, will be part of the glorious kingdom! Philistia and Tyre on the west were always a threat to Israel, but they will be included. Ethiopia is “Cush,” a nation in Africa. Of course, of all these nations, only Egypt is still on the map, but the message is clear: when the Lord establishes His glorious kingdom, and Messiah reigns from Jerusalem, Israel’s enemies will be transformed into fellow citizens. Through the preaching of the gospel today, this miracle is happening in His church (Eph. 2:11–22; Gal. 3:26–29). The Old Testament prophets promised that believers from all the nations of the earth would be included in Messiah’s reign (Isa. 2:1–5; Mic. 4:1–5; Zech. 8:23; 14:16–20), and so did the psalmists (22:27; 46:10; 47:9; 57:5, 11; 98:2–3; 99:2–3). “For the earth will be filled with the knowledge of the glory of the Lord, as the waters cover the sea” (Hab. 2: nkjv).