'Peculiar Treasure' in the Bible

I gathered me also silver and gold, and the peculiar treasure of kings and of the provinces; I got me men-singers and women-singers, and the delights of the children of men, a wife and concubines.

And they shall be unto me a peculiar treasure, saith Jehovah of hosts, in the day that I prepare; and I will spare them as a man spareth his own son that serveth him.