All nations — The Romans who at that time had the rule over all the nations of that part of the world. The residue — That small number of the Jews who were spared by Titus. Shall not be cut off — Were not forbidden to dwell about the city.
Related Commentaries of Zechariah 14:2
Zechariah 14:2
2 For I will gather all nations against Jerusalem to battle; and the city shall be taken, and the houses rifled, and the women ravished; and half of the city shall go forth into captivity, and the residue of the people shall not be cut off from the city.