'Peculiar' in the Bible

Now therefore, if you will in fact obey My voice and keep My covenant (agreement), then you shall be My own special possession and treasure from among all peoples [of the world], for all the earth is Mine;

for you are a holy people [set apart] to the Lord your God; and the Lord has chosen you out of all the peoples who are on the earth to be a people for His own possession.

Today the Lord has declared that you are His people, His treasured possession, just as He promised you, and that you are to keep all His commandments;

For the Lord has chosen [the descendants of] Jacob for Himself,Israel for His own special treasure and possession.

Then I looked again at vanity under the sun [in one of its peculiar forms].

“They will be Mine,” says the Lord of hosts, “on that day when I publicly recognize them and openly declare them to be My own possession [that is, My very special treasure]. And I will have compassion on them and spare them as a man spares his own son who serves him.”