The truth of the matter is in the inerrant and infallible Word of YHWH. The Lord is quoted in Genesis 12:3 (speaking of the great nation to be spawned from Abraham's seed), "And I will bless them that bless thee, and curse him that curses thee." He was speaking of Israel.
If that is not direct enough, there is also Zechariah 12:3, where YHWH says, "And in that day will I make Jerusalem a burdensome stone for all people: all that burden themselves with it shall be cut in pieces, though all the people of the earth be gathered together against it."
Y again says in Zechariah 12:9, "And it shall come to pass in that day, that I will seek to destroy all the nations that come against Jerusalem."
In Ezekiel 38:18, the Lord says, "And it shall come to pass at the same time when Gog shall come against the land of Israel, saith YHWH our Elohim, that my fury shall come up in my face."
There are many other verses that confirm Genesis 12:3.
If that is not direct enough, there is also Zechariah 12:3, where YHWH says, "And in that day will I make Jerusalem a burdensome stone for all people: all that burden themselves with it shall be cut in pieces, though all the people of the earth be gathered together against it."
Y again says in Zechariah 12:9, "And it shall come to pass in that day, that I will seek to destroy all the nations that come against Jerusalem."
In Ezekiel 38:18, the Lord says, "And it shall come to pass at the same time when Gog shall come against the land of Israel, saith YHWH our Elohim, that my fury shall come up in my face."
There are many other verses that confirm Genesis 12:3.