isaiah 45:14 Thus saith the LORD, The labour of Egypt, and merchandise of Ethiopia and of the Sabeans, men of stature, shall come over unto thee, and they shall be thine: they shall come after thee; in chains they shall come over, and they shall fall down unto thee, they shall make supplication unto thee, saying, Surely God is in thee; and there is none else, there is no God. - Free Bible Online

      14. The language but cursorily alludes to Egypt, Ethiopia, and Seba, being given to Cyrus as a ransom in lieu of Israel whom he restored (Isa 43:3), but mainly and fully describes the gathering in of the Gentiles to Israel (Ac 2:10, 11; 8:27-38), especially at Israel's future restoration (Isa 2:2; 14:1, 2; 19:18-22; 60:3-14; 49:23; Ps 68:31; 72:10, 11).
      labour--wealth acquired by labor (Jer 3:24).
      Sabeans . . . of stature--the men of Meroe, in Upper Egypt. HERODOTUS (3.30) calls the Ethiopians "the tallest of men" (see on Isa 18:2; 1Ch 11:23).
      thee--Jerusalem ("my city," Isa 45:13).
      in chains-- (Ps 149:8). "The saints shall judge the world" (1Co 6:2) and "rule the nations with a rod of iron" (Zec 14:12-19; Re 2:26, 27). The "chains," in the case of the obedient, shall be the easy yoke of Messiah; as "the sword of the Spirit" also is saving to the believer, condemnatory to the unbeliever (Joh 12:48; Heb 4:12; Re 19:15).
      God is in thee-- (Jer 3:19).

JFB.