Zechariah 10:10
I will bring them again also out of the land of Egypt, and gather them out of Assyria; and I will bring them into the land of Gilead and Lebanon; and place shall not be found for them.
Cross-reference
Zechariah 8:7 likewise promises salvation from east and west, directly reinforcing the gathering from Egypt and Assyria here.
In Isaiah 11:11-16, the Lord gathers His remnant from Egypt and Assyria—a direct parallel to the regathering prophesied in Zechariah 10:10.
In Isaiah 27:12, the Lord threshes and gathers Israel from the Euphrates to the Brook of Egypt—parallel to gathering from Egypt and Assyria.
Isaiah 27:13 describes a trumpet call gathering the lost from Assyria and Egypt to worship in Jerusalem—directly parallel to Zechariah's regathering.
Hosea 11:11 says they will come trembling from Egypt and Assyria and be set in their homes—a clear parallel to Zechariah's promise.
Micah 7:12 lists regions (Assyria, Egypt, River) from which people come—directly echoing the same gathering in Zechariah 10:10.
In Hosea 9:6, exile to Egypt brings destruction and burial, opposite to the regathering promised here.
In Zephaniah 2:13, Assyria's destruction contrasts with God gathering his people from Assyria here.