Jacob, surnamed Israel, is made up of every kindred, and tongue, and people, and nation, all of God's elect.
Genesis 48 (Young's Literal Translation)
14 And Israel putteth out his right hand, and placeth [it] upon the head of Ephraim, who [is] the younger, and his left hand upon the head of Manasseh; he hath guided his hands wisely, for Manasseh [is] the first-born. 18 and Joseph saith unto his father, `Not so, my father, for this [is] the first-born; set thy right hand on his head.' 19 And his father refuseth, and saith, `I have known, my son, I have known; he also becometh a people, and he also is great, and yet, his young brother is greater than he, and his seed is the fulness of the nations;'
Acts 1 (ESV)
6 So when they had come together, they asked him, "Lord, will you at this time restore the kingdom to Israel?" 7 He said to them, "It is not for you to know times or seasons that the Father has fixed by his own authority. 8 But you will receive power when the Holy Spirit has come upon you, and you will be my witnesses in Jerusalem and in all Judea and Samaria, and to the end of the earth."
Romans 11 (ESV)
25 Lest you be wise in your own sight, I do not want you to be unaware of this mystery, brothers: a partial hardening has come upon Israel, until the fullness of the Gentiles has come in. 26 And in this way all Israel will be saved, as it is written, "The Deliverer will come from Zion, he will banish ungodliness from Jacob"; 27 "and this will be my covenant with them when I take away their sins."