Zechariah 13:8

13:8 It will happen in all the land, says the Lord,

that two-thirds of the people in it will be cut off and die,

but one-third will be left in it.

Zechariah 14:16

14:16 Then all who survive from all the nations that came to attack Jerusalem will go up annually to worship the King, the Lord who rules over all, and to observe the Feast of Tabernacles.