Biblical Sources. Israel and Judah as the Chosen People
Exodus (NASB) 19:
5 Now then, if you will indeed obey My voice and keep My covenant, then you shall be My own possession among all the peoples, for all the earth is Mine; 6 and you shall be to Me a kingdom of priests and a holy nation. These are the words that you shall speak to the sons of Israel.
Deuteronomy (NASB) 14:
1 You are sons of the LORD your God; you shall not cut yourselves nor shave a bald spot above your forehead for the dead. 2 For you are a holy people to the LORD your God, and the LORD has chosen you to be a people for His personal possession out of all the peoples who are on the face of the earth.
Deuteronomy (NASB) 7:
6 For you are a Holy People to the LORD your God; the LORD your God has chosen you to be a people for His personal possession out of all the peoples who are on the face of the earth.
Deuteronomy (NASB) 26:
18 And the LORD has today declared you to be His people, His personal possession, just as He promised you, and that you are to keep all His commandments; 19 and that He will put you high above all the nations which He has made, for glory, fame, and honor; and that you shall be a consecrated people to the LORD your God, just as He has spoken.
Psalm (NASB) 135:
4 For the LORD has chosen Jacob for Himself,
Israel as His own possession.
Amos (NASB) 3:
1 Hear this word which the LORD has spoken against you, sons of Israel, against the entire family which He brought up from the land of Egypt:
2 You only have I known among all the families of the earth;
Therefore I will punish you for all your wrongdoing.