Gen 21, 13 I will make a great nation of him also

(Gen 21, 13) I will make a great nation of him also

[13] As for the son of the slave woman, I will make a great nation of him also, since he too is your offspring."

(CCC 60) The people descended from Abraham would be the trustees of the promise made to the patriarchs, the chosen people, called to prepare for that day when God would gather all his children into the unity of the Church (Cf. Rom 11:28; Jn 11:52; 10:16). They would be the root on to which the Gentiles would be grafted, once they came to believe (Cf. Rom 11:17-18, 24). (CCC 56) After the unity of the human race was shattered by sin God at once sought to save humanity part by part. The covenant with Noah after the flood gives expression to the principle of the divine economy toward the "nations", in other words, towards men grouped "in their lands, each with (its) own language, by their families, in their nations" (Gen 10:5; cf. 9:9-10, 16; 10:20-31). (CCC 57) This state of division into many nations is at once cosmic, social and religious. It is intended to limit the pride of fallen humanity (Cf. Acts 17:26-27), united only in its perverse ambition to forge its own unity as at Babel (Cf. Wis 10:5; Gen 11:4-6). But, because of sin, both polytheism and the idolatry of the nation and of its rulers constantly threaten this provisional economy with the perversion of paganism (Cf. Rom 1:18-25). (CCC 58) The covenant with Noah remains in force during the times of the Gentiles, until the universal proclamation of the Gospel (Cf. Gen 9:16; Lk 21:24; DV 3). The Bible venerates several great figures among the Gentiles: Abel the just, the king-priest Melchisedek - a figure of Christ - and the upright "Noah, Daniel, and Job" (Cf. Gen 14:18; Heb 7:3; Ezek 14:14). Scripture thus expresses the heights of sanctity that can be reached by those who live according to the covenant of Noah, waiting for Christ to "gather into one the children of God who are scattered abroad" (Jn 11:52).